Well I have never done anything that small on the Computurn, did do a small spindle for the hyraulic lever on the tailstock of the lathe, it was about 3mm dia 50mm long with a 5mm dia ball near the end, I was surprised how easy it was. In fact I made 3 just to make sure the first one wasnt just luck
Worst job I have done on it was turning 6.5mm dia x 100mm long Mu metal down to 3mm dia. That stuff is a nightmare to turn, one wrong move and it wraps itself in knots and it was about £1000 per meter if I recall correctly.
I prefer the big stuff though, hearing the chips rattle off the tin work is nice
Hopefully you will get some progress now you have the DSPMC, certainly looking forward to the pics and of course the vid when its up and running
Hood