Alibre CAD eboat basic hull and propeller helix

I've tried ships a few times and never been happy, Bismarck being the one I have uploaded a couple of times.
Lofting with Bismarck used 12MB, my new system uses 1MB to create a proper skinned half-hull and 1.5MB with mirroring.
Got a good basic system now. Use the TOP views of the hull and draw the basic drawings you want from the maindeck down to the keel.
You can see the reference planes I used.
Use these to draw the skin of the hull, I used 1mm here, lofting from A to B, then from B to C. If you do a half hull you can mirror to finish with no errors.
If you use straight lines you can export as an easy .obj file and use a program like Lamina to cut the goofy hull shape then drop it back into Alibre as a .dxf file for re-drawing and exporting as an .stl for your CAM program to do the cutting process as flat hull sections... or even a complete flat profile skin for one side of the vessels hull. (yes I was impressed too.)
The Helix. It might be a cheat, Alibre doesn't like messing with them and trying to boss-extrude into one fails for me.
Computer says no.(see edit)
I put a hole in the middle of the ellipse and ran a reference from one edge.
I have also shown the helix boss commands I used.
I put an axis into it so I could constrain it in the main eboat assemby and it looks pretty damned good to me.
Making it would be a different matter... ado1 says no, but maybe one day...
edit: Just realised you can put together a proper propeller as a separate assembly file, then export it to a CAM program as an .stl with Alibre, (as well as including it into a bigger Alibre assembly) so there you go
I have now updated my Bismarck at • Bismarck hull in Alibr...