Quinn, that book, Building the new Shay. Well, in the hills between San Jose Ca, and Santa Cruz, is a narrow gauge short line railroad, Roaring Camp. Fell in love with their Ephraim Shay locomotives. (That was in 1969.) What, a steam loco, with a crankshaft and universal joints? steve
Who would have thunk an adequate little safety valve would have been so allusive? A long road but seeing the engine run on live steam had to be VERY rewarding.
The lifting pressure of the safety valve is going to be the port area the ball is blocking but the closing pressure will be the projected area of the ball (or the ball plus carrier). With the ball in carrier design, you probably need to have more than the two filed flats so that the carrier is not acting as a pressure restriction. Perhaps more holes in the top too, so the only pressure inside the valve is from the steam passing through. (Thoughts from a bloke who has not done as much with steam as you...)
A couple of methods I've used to true up a flywheel that is off center. 1) use a round file to remove material inside the hub. The outside may need to be recut to get rid of hump after adjustment. 2) bore and sleeve the center hole.
Consider heat soaking your flywheel in your kitchen oven at it's highest temperature for a couple of hours with a slow cool-down (say 50°F, wait 15 minutes, repeat until around 200)
Though I'm a cabinetmaker by trade, I love watching you work and learn on small items. Strangely enough, another favourite RUclips channel of mine is Cutting Edge Engineering, who tends to work on oversize machinery for a living.
Great Job Quinn!!! Love that you dont mind having a go at modifying and making new safety valves etc :) soon you wont be buying any parts at all! People will be asking for a Quinn Co. Steamomatic Boiler Kit soon enough!!!
Apart from Quinn's depth and breadth of knowledge and sheer virtuosity on machine tools, her blow-by-blow commentary and Sahara dry sense of humor well exceed the price of admission. I'm addicted to this channel.
Hi Quinn, just wanted to say what a beautiful work you’ve done! I do wish to comment on the mention of this valve being used as a pressure regulator valve at ~5:40 point. Boiler Safety Valves are safety devices and not part of normal operations. If a Fireman is causing the the Safety Valve to lift on a regular basis it would likely end his employment. Boiler pressure should be regulated by matching the firing rate with the Steam output. I understand that a quick closing of the steam stop will cause a pressure spike and subsequent Safety Valve lifting but this would be the exception not the rule. Marine Boiler Safety valve lift pressure is set at 10% above the MAWP (maximum allowable working pressure) and adjusted by changing spring tension. The Blowdown is adjusted by moving the huddling chamber or seating ring. Valves are designed to blowdown below MAWP even while at max firing rate to be assured of protection of the personnel. There are good cutaways of Marine Boiler Safety Valves on the internet.
You can reduce the CO production of your burner/boiler setup by increasing the air gap between the burner and the boiler. Even if the burner is very near stoichiometric mixture, the cold metal will quench the flame before all the oxidation completes, leaving you with CO instead of CO2.
Choo choo! Thanks for the reminder about CO. And thanks for giving your viewers a (blurry) look inside one of Kozo's groundbreaking books. The wealth of excellent illustrations continues through the whole book, and series. The best.
Owing to family holiday nonsense I was unable to watch when this episode appeared. It's just as delightful and satisfying as I hoped it would be. Thanks and happy new year!
Merry Christmas Quinn! Just goes to show that you should never trust a blow off valve until you have tested it - you can use the same rig you used for the boiler test . Maybe the reason for the valves not closing is the steam flow is keeping the ball off its seat because the ball is in the end of a cylinder and acting like a piston .If you set the valve up in the mill and use an end mill to cut some flutes in the bore where the ball sits this would give the steam a path around the ball .
The flywheel warpage is more than likely from the casting not being seasoned before machining. Most cheep castings are shipped with out seasoning. Good luck from the Shire.
This has been a most enjoyable series this year: Watching Quinn build a thing that I will never in my life attempt to build, all the while learning so many things about the process of fabrication and machining.
You mention that with a (model) steam engine creating heat with combustion feels satisfying in a way that creating heat with electric energy doesn't. I agree. Building a model steam engine is a celebration of ingenuity. Electric energy is _new_ technology. The engineering way to convert electric energy into mechanical energy is by using an electric motor. For a steam engine it is ever so satisfying to use an energy source that _only_ a steam engine can turn into mechanical energy.
Every time I would see that the week's video was steam I would groan. Every week I watched with anticipation and excitement and finally contentment with the machining, theory, and humor. Congrats on the completion of this project. You are a very talented young woman. Looking forward to the next project. Paul (Patron).
I was wondering if you could repost the link for you hydro test rig. was sure I saw it once but can't seem to find it now. I was also wondering if it is possible to connect two boilers together in parallel through one way valves to get an increased steam supply ? I very much enjoy the way you explain the things you do and the reasoning for why you do them that way. Thanks for the videos and the variety of project you post about.
I'm not sure why EXACTLY I'm so fond of your channel. Your a far better teacher than many, your wonderfully articulate, many of your posts are about just what I'm dealing with, and you make stuff I thought I could care nothing about, yet you have made me interested!! (E.G. steam stuff). A Joy filled holiday season to you Quinn!
Hard work and perseverance have paid off! Now all you have to do is get onto Santa's naughty list and you get to have fun and get a cheap supply of coal to fuel a boiler! Win/Win!
Ok, Quinn, you've infected me... I caught myself trying to say... "As is Tradition" in one of my videos... Of course I credited you, & gave you a shoutout... But, still...
Great job! Small steam valves these days have many issues. #1 are the ball-bearing hardened? If not there not ground which means as it turns it will leak. #2 you can lap the ball seat with a spare ball to seal better as wear shows, sometimes needed when new. #3 I find that the some springs loose tension over time. One I had was steel not stainless and the spring rusted inside without me knowing, so I adjusted it, over time the rusty material damagd the seat and was Un machineable at that point. Hope this helps and can't wait to see more.
My experience with safety valves for boilers are, that once they pop they don't stop. On the plus side, it looked kind of homey to see that string of smoke slipping out of the evacuation pipe. We always tried our hardest not to activate them, because everyone knew that they would be leaking until next shutdown and revision. Good times! :)
@@markfergerson2145 I have asked myself the "in this day and age" argument myself many times :) The safetyvalves construction might be hard to explain in text, but essentially in/out take valves from an engineblock, size XXXL and then a spring at 25 bar attached to it. Technically the spring was pneumatic pressure, but principle is the same. Probably crud as you say, but also these sort of things need maintenance which always is the first thing to go during cutbacks. The valve might seat good enough in one position, then it blows and rotates a bit and will have to be battered down, I imagine.
@@PhilG999 we have the same rules in Sweden. Also, one valve must be able to deal with 4 times the production, and always at least double valves. They must be situated in such a way that when you turn of one, the second will always be on. There is more to valves then people think :)
0:48 I like to model threads in before printing and then if they're too tight I'll open them up with a tap. Modelling the threads in only takes a few clicks in Fusion 360 and since they're already there, if you do have to use a tap the torque you need to apply is significantly less, so it can save a lot of headaches. It's unlikely to be an issue with that funnel but I thought I should mention it anyway. I once had to scrap a very large print because I tried to tap a deep hole that had no threads - there weren't enough perimeters so the 'tube' that made up the walls of the hole sheared off and stayed stuck on the tap, so I had to cut the thing apart to get the tap out. It set me back about a day and a half having to reprint the part (plus redoing the sanding and painting) so I've made sure to never make that mistake again.
Congratulations on a successful startup! It's so satisfying seeing both of these projects come together. I admit I was a little concerned (ok, a lot concerned) when you started modifying the safety relief valve but my only experience with a boiler (somewhat) like yours is a boiling water reactor; it's amazing how easily you can spook nuclear people with steam and pressure vessels, even tiny ones :)
Fantastic Quinn, great to see the boiler run the engine. Spent quite a portion of my life trying to resolve residual stress / out of flatness strip steel and plate professionally, so interested in the slow warp of your flywheel. It appeared to be a tricky part for both you and Joe Pi to machine and its a pretty spindly part anyway.
Steam temp at 60psi 307°F, green Loctite temp range 65-300°F. Close but no cigar. Loctite 263 can handle those temps no problem. Nice to see it up and running.
Kozo’s safety valves are assembled with 603 and they function perfectly for years. Just because the pure steam temp is that high doesn’t mean the surface of the metals ever see that temperature. The real world is more nuanced than your comment would like to believe.
*This* Revolution was televised! (sorry... just couldn't help myself.) Happy Holidays Quinn! I have really enjoyed this series with ALL the details you have given. Props for using the the word 'hysteresis' correctly... heck props for using it at all! OK... leaving.
Concerning the feed pump, absolutely make a hand pump similar to the sort used on a 2.5"/3.5" gauge loco, always useful for emergencies! But it would be cool if you were planning on putting together a little steam plant to have a water feed pump running from the engine, either directly or through overhead layshafts (miniature ones of course)
$$ + patience, trial and error+ troubleshooting skill = steam project success, nice work Quinn, have a happy new year! Congratulations on the subs, everybody loves you!
Beauty! I am really eager to see what you do with the feed pump...something I've been wanting to learn more about for a long time...thanks for sharing!!! Merry Christmas to you and yours.
Happy holidays Quinn! The boiler looks great. Also, THANK YOU for discussing the importance of the CO detector! I work in life safety, and love so see people who take it seriously.
Yaaaaaay! 🎉🎉 🎉 🎇 🎇 🎇 That's awesome! Well done, I've watched along with you building it and you've done a great job. Bet you're stoked as (I was) when that flywheel turned by itself for the first time. 👏 👏 👏
Awesome. I used to drive a friends 5” Sweetpea and one spent a lot of time tapping on various valves to open or close or just clear the condensate out (esp the whistle valve). I remember the safety valve being separate from the pressure regulator, the gas fire would use gas fast enough to freeze condensate on the outside of the gas bottle, and could easily blow the regulator and safety if you let it get out of hand. Best remedy for too much steam is to open the drain cocks and drive with a full train, that would ‘waste’ steam usefully.
Question you might lookup industrial safety valve and copy it to fit the size of your boiler industrial valves have a settable blow back setting. If it goes off at 60 psi you can set the blow back to close at 55 psi. I have fried industrial for over 42 years the biggest was 200,000 pph. O yes Merry Christmas, Quinn!!
![Felix "Unfair" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/Oswujxm2Ag0/mqdefault.jpg)
The James Webb Space Telescope launch AND Quinn's boiler making steam on the same day? Now that's what I call an Industrial Revolution.
Quinn, that book, Building the new Shay.
Well, in the hills between San Jose Ca,
and Santa Cruz, is a narrow gauge short
line railroad, Roaring Camp. Fell in love
with their Ephraim Shay locomotives.
(That was in 1969.)
What, a steam loco, with a crankshaft
and universal joints?
steve
Who would have thunk an adequate little safety valve would have been so allusive? A long road but seeing the engine run on live steam had to be VERY rewarding.
Yay! It's Blondihacks time!! Merry Christmas, Quinn!!
The lifting pressure of the safety valve is going to be the port area the ball is blocking but the closing pressure will be the projected area of the ball (or the ball plus carrier). With the ball in carrier design, you probably need to have more than the two filed flats so that the carrier is not acting as a pressure restriction. Perhaps more holes in the top too, so the only pressure inside the valve is from the steam passing through. (Thoughts from a bloke who has not done as much with steam as you...)
18:20 Legend! That must be soooo satisfying!
Way to go Quinn, it's a thing of beauty
A couple of methods I've used to true up a flywheel that is off center. 1) use a round file to remove material inside the hub. The outside may need to be recut to get rid of hump after adjustment. 2) bore and sleeve the center hole.
Essential milestone indeed! All the rest is housekeeping (still necessary, though). Well done, inspector signs the paperwork, drinks all round, etc.
Hi Quinn,
Congrats on making steam with the boiler and running the engine on steam. Seasons Greetings to you and the family and you all stay safe.
This is where I learned what hysteresis is, which came up in conversation today about sump pump controls. So thanks again for that.
I love that you include everything that didn't work and the progression to the things that do.
Very nice! Can't wait to see it all piped up. It is recommended to replace the steel ball after using a hammer to seat it.
That is one beautiful boiler, I really like the vertical form, and that will be great with a feed pump added to your engine. Thanks!
light the boiler outside the boiler set the boiler on top of the boiler and in the future light the boiler under the boiler! YAY!
Consider heat soaking your flywheel in your kitchen oven at it's highest temperature for a couple of hours with a slow cool-down (say 50°F, wait 15 minutes, repeat until around 200)
Though I'm a cabinetmaker by trade, I love watching you work and learn on small items. Strangely enough, another favourite RUclips channel of mine is Cutting Edge Engineering, who tends to work on oversize machinery for a living.
A Blondihacks video on Christmas day? Its a Quinnmas miracle!
Thanks and Happy Holidays.
Great Job Quinn!!! Love that you dont mind having a go at modifying and making new safety valves etc :) soon you wont be buying any parts at all! People will be asking for a Quinn Co. Steamomatic Boiler Kit soon enough!!!
Apart from Quinn's depth and breadth of knowledge and sheer virtuosity on machine tools, her blow-by-blow commentary and Sahara dry sense of humor well exceed the price of admission. I'm addicted to this channel.
Hi Quinn, just wanted to say what a beautiful work you’ve done! I do wish to comment on the mention of this valve being used as a pressure regulator valve at ~5:40 point. Boiler Safety Valves are safety devices and not part of normal operations. If a Fireman is causing the the Safety Valve to lift on a regular basis it would likely end his employment. Boiler pressure should be regulated by matching the firing rate with the Steam output. I understand that a quick closing of the steam stop will cause a pressure spike and subsequent Safety Valve lifting but this would be the exception not the rule. Marine Boiler Safety valve lift pressure is set at 10% above the MAWP (maximum allowable working pressure) and adjusted by changing spring tension. The Blowdown is adjusted by moving the huddling chamber or seating ring. Valves are designed to blowdown below MAWP even while at max firing rate to be assured of protection of the personnel. There are good cutaways of Marine Boiler Safety Valves on the internet.
You can reduce the CO production of your burner/boiler setup by increasing the air gap between the burner and the boiler. Even if the burner is very near stoichiometric mixture, the cold metal will quench the flame before all the oxidation completes, leaving you with CO instead of CO2.
Choo choo!
Thanks for the reminder about CO.
And thanks for giving your viewers a (blurry) look inside one of Kozo's groundbreaking books. The wealth of excellent illustrations continues through the whole book, and series. The best.
Fantastic, congratulations Quinn so good the hear your engine running on your new boiler
Owing to family holiday nonsense I was unable to watch when this episode appeared. It's just as delightful and satisfying as I hoped it would be. Thanks and happy new year!
Nicely done. It's lovely to see that boiler all put together with the cap and chimney. It looks so official!
Heck yeah the moment we've been waiting for!
I'm watching your latest project on a boiler. I am impressed to say the least.
Great job! So fun! I always use a least 3 recessed grub screws on flywheels, that way I can true up most any wobble
Merry Christmas Quinn!
Just goes to show that you should never trust a blow off valve until you have tested it - you can use the same rig you used for the boiler test .
Maybe the reason for the valves not closing is the steam flow is keeping the ball off its seat because the ball is in the end of a cylinder and acting like a piston .If you set the valve up in the mill and use an end mill to cut some flutes in the bore where the ball sits this would give the steam a path around the ball .
For increasing boiler capacity consider using one to preheat and feed the other. Thanks for all the educational content
if you back out the grub screw on the center nut the nut acts as the register for the pressure applied to the spring on the stuart
Merry Christmas, Quinn. You are awesome! Thank You!
If I'd spent fifty bucks on a valve that didn't work I'd be furious, dunno how you stayed so chill for the voiceover Quinn.
The flywheel warpage is more than likely from the casting not being seasoned before machining. Most cheep castings are shipped with out seasoning. Good luck from the Shire.
Its not complete but the fit and finish already surpasses the electric model. Happy holidays.
Neat!
And Merry Christmas and a Happy New Year!
Thanks, and Meow to Sprocket.
Now that is quite the Christmas present. Congratulations on first Steam.
This has been a most enjoyable series this year: Watching Quinn build a thing that I will never in my life attempt to build, all the while learning so many things about the process of fabrication and machining.
A vous aussi bonnes fêtes
Congratulations 🎉 and Happy Festivus
You mention that with a (model) steam engine creating heat with combustion feels satisfying in a way that creating heat with electric energy doesn't. I agree.
Building a model steam engine is a celebration of ingenuity. Electric energy is _new_ technology. The engineering way to convert electric energy into mechanical energy is by using an electric motor. For a steam engine it is ever so satisfying to use an energy source that _only_ a steam engine can turn into mechanical energy.
Every time I would see that the week's video was steam I would groan. Every week I watched with anticipation and excitement and finally contentment with the machining, theory, and humor. Congrats on the completion of this project. You are a very talented young woman. Looking forward to the next project. Paul (Patron).
Next, a hard-rock gold mine or a grist mill to make use of your motor? Great stuff, love your videos.
You made it!!! Finally well done now bigger and add a generator set and make useful power!!!
Great boiler making. Merry Christmas.
I was wondering if you could repost the link for you hydro test rig. was sure I saw it once but can't seem to find it now.
I was also wondering if it is possible to connect two boilers together in parallel through one way valves to get an increased steam supply ? I very much enjoy the way you explain the things you do and the reasoning for why you do them that way. Thanks for the videos and the variety of project you post about.
Woooo!!!!! Actual fire driven steam engine...awesome!!!!!
The bandsaw disassembly part(s) were the best!
👍🏻As a carpenter for over forty years all I can say is "Way to nail it Blondie"! Happy Holidays.
This comment dovetails nicely with what I was going to say.
I have that same Kozo Shay book. It's a true treasure!
Very nice job the boiler has turned out beautiful 👍👍👍
I'm not sure why EXACTLY I'm so fond of your channel. Your a far better teacher than many, your wonderfully articulate, many of your posts are about just what I'm dealing with, and you make stuff I thought I could care nothing about, yet you have made me interested!! (E.G. steam stuff). A Joy filled holiday season to you Quinn!
Hard work and perseverance have paid off! Now all you have to do is get onto Santa's naughty list and you get to have fun and get a cheap supply of coal to fuel a boiler! Win/Win!
Ok, Quinn, you've infected me... I caught myself trying to say... "As is Tradition" in one of my videos... Of course I credited you, & gave you a shoutout... But, still...
Great job!
Small steam valves these days have many issues. #1 are the ball-bearing hardened? If not there not ground which means as it turns it will leak. #2 you can lap the ball seat with a spare ball to seal better as wear shows, sometimes needed when new. #3 I find that the some springs loose tension over time. One I had was steel not stainless and the spring rusted inside without me knowing, so I adjusted it, over time the rusty material damagd the seat and was Un machineable at that point.
Hope this helps and can't wait to see more.
My experience with safety valves for boilers are, that once they pop they don't stop.
On the plus side, it looked kind of homey to see that string of smoke slipping out of the evacuation pipe.
We always tried our hardest not to activate them, because everyone knew that they would be leaking until next shutdown and revision.
Good times! :)
@@markfergerson2145 I have asked myself the "in this day and age" argument myself many times :)
The safetyvalves construction might be hard to explain in text, but essentially in/out take valves from an engineblock, size XXXL and then a spring at 25 bar attached to it. Technically the spring was pneumatic pressure, but principle is the same.
Probably crud as you say, but also these sort of things need maintenance which always is the first thing to go during cutbacks. The valve might seat good enough in one position, then it blows and rotates a bit and will have to be battered down, I imagine.
@@PhilG999 we have the same rules in Sweden. Also, one valve must be able to deal with 4 times the production, and always at least double valves. They must be situated in such a way that when you turn of one, the second will always be on.
There is more to valves then people think :)
0:48 I like to model threads in before printing and then if they're too tight I'll open them up with a tap. Modelling the threads in only takes a few clicks in Fusion 360 and since they're already there, if you do have to use a tap the torque you need to apply is significantly less, so it can save a lot of headaches.
It's unlikely to be an issue with that funnel but I thought I should mention it anyway. I once had to scrap a very large print because I tried to tap a deep hole that had no threads - there weren't enough perimeters so the 'tube' that made up the walls of the hole sheared off and stayed stuck on the tap, so I had to cut the thing apart to get the tap out. It set me back about a day and a half having to reprint the part (plus redoing the sanding and painting) so I've made sure to never make that mistake again.
Nice work. I think the custom funnel is neat.
Congratulations on a successful startup! It's so satisfying seeing both of these projects come together. I admit I was a little concerned (ok, a lot concerned) when you started modifying the safety relief valve but my only experience with a boiler (somewhat) like yours is a boiling water reactor; it's amazing how easily you can spook nuclear people with steam and pressure vessels, even tiny ones :)
Fantastic Quinn, great to see the boiler run the engine. Spent quite a portion of my life trying to resolve residual stress / out of flatness strip steel and plate professionally, so interested in the slow warp of your flywheel. It appeared to be a tricky part for both you and Joe Pi to machine and its a pretty spindly part anyway.
Extremely thin castings are the worst! 😅
Sweet! Such fun to see the project get past proof of concept!
Steam temp at 60psi 307°F, green Loctite temp range 65-300°F. Close but no cigar. Loctite 263 can handle those temps no problem.
Nice to see it up and running.
Kozo’s safety valves are assembled with 603 and they function perfectly for years. Just because the pure steam temp is that high doesn’t mean the surface of the metals ever see that temperature. The real world is more nuanced than your comment would like to believe.
Thanks Quinn - merry Christmas
*This* Revolution was televised! (sorry... just couldn't help myself.)
Happy Holidays Quinn!
I have really enjoyed this series with ALL the details you have given.
Props for using the the word 'hysteresis' correctly... heck props for using it at all!
OK... leaving.
Hey Quinn... for a perfect seat on the ball check, might like to use a "Ball Mill" the same diameter as the check ball. Just a thought.
Rough machine castings like that flywheel....then leave em outside to weather for a few months...
🇬🇧🙂
Main Steam Models would be proud ... looks good ... so far ...
Merry Christmas 🎅
Wishing you a very Merry Christmas Quinn!🎄
Koso’s books are amazing, I gave them to me for Christmas
Concerning the feed pump, absolutely make a hand pump similar to the sort used on a 2.5"/3.5" gauge loco, always useful for emergencies! But it would be cool if you were planning on putting together a little steam plant to have a water feed pump running from the engine, either directly or through overhead layshafts (miniature ones of course)
This and James Webb on the same day! It's like book ends on the Industrial Revolution.
Yes! So exciting that it finally went up
$$ + patience, trial and error+ troubleshooting skill = steam project success, nice work Quinn, have a happy new year! Congratulations on the subs, everybody loves you!
Elegant, fit for any steampunk movie.
Joyeux Noel 🎄
MERRY CHRISTMAS to all.
Beauty!
I am really eager to see what you do with the feed pump...something I've been wanting to learn more about for a long time...thanks for sharing!!!
Merry Christmas to you and yours.
Happy holidays Quinn! The boiler looks great. Also, THANK YOU for discussing the importance of the CO detector! I work in life safety, and love so see people who take it seriously.
Mr. Appleton would be proud of you 👍
So Cool!
love your videos, great machinist, very good at diagnosing & superb narrating !
Very well put together. Thank you Quinn
Woohoo!!! Congratulations! Merry Christmas and a safe and relaxing new year 😊
Yaaaaaay! 🎉🎉 🎉 🎇 🎇 🎇 That's awesome! Well done, I've watched along with you building it and you've done a great job. Bet you're stoked as (I was) when that flywheel turned by itself for the first time. 👏 👏 👏
Awesome. I used to drive a friends 5” Sweetpea and one spent a lot of time tapping on various valves to open or close or just clear the condensate out (esp the whistle valve). I remember the safety valve being separate from the pressure regulator, the gas fire would use gas fast enough to freeze condensate on the outside of the gas bottle, and could easily blow the regulator and safety if you let it get out of hand. Best remedy for too much steam is to open the drain cocks and drive with a full train, that would ‘waste’ steam usefully.
Thank you. The whole series has been very educational. I enjoyed every second.
Thanks for sharing Quinn, Best Wishes to You and Yours for a great New Year.
And your model(s) are so good. Really great!
Congratulations Quinn!
Merry Xmas....thanks so much for the education and entertainment. Wonderful to see the boiler working.
Question you might lookup industrial safety valve and copy it to fit the size of your boiler industrial valves have a settable blow back setting. If it goes off at 60 psi you can set the blow back to close at 55 psi. I have fried industrial for over 42 years the biggest was 200,000 pph. O yes Merry Christmas, Quinn!!
I can't believe this video is only showing up on my feed now days later
I have never done a 3d printed funnel, I don't know why. It's very smart.
congrats Quinn, and Merry Christmas!
That is some achievement. Yay!!!!
Congratulations! Awesome accomplishment 👏
I can only imagine how satisfying that last clip must have been to capture...
Merry Christmas, Quinn!!
Use grafi-sil (silicon) balls insread of stainless stell balls and your safety valves will work much better. Nice video, thumps up.
Can't wait to see you complete this one!