Andre, Very nice work on the Collet system. You sure you are 14? if you are and you stay with this you could quite possibly be the best Machinist/design enginer ever! You have both the skill and imagination needed. A little more knowlege and you will be better able to choose materials, calc. loads and all that. Consider the fact that there is a huge decline in the number of manual machinists right now do to all the CNC stuff out there, you could be carying the torch for the future of the manual machinist. One last thing, I have been working with metal for over 30 years Mostly in steel fab and erection. Only in the last few years have I started doing machine work in the sense of using a lathe and mill. but with all my background in metal working you just blew me away. Thanks for the great forum! still looking forward to seeing video of this thing working. Mark