Making a Chuck Jaw Screw

This is a video about how I went about making a Jaw Screw for my 10" four jaw chuck. Despite the drawbacks I managed to finish the project before something else went wrong.
Anyway done it is and as I stated in the video I will harden it whwn I get my hands on the mini furnace. hope you enjoy the video.
For those wating to see me making another experimental tool i ask you be patient with me on this, I have made all the drawings and I've sourced the material, its just that I'll wait untill I have moved to my next workshop before I unveil what it is Ive got planned, I think you'll like it. cheers for now..