Thanks Mactec,

The ballscrews are the hardest part - there are no UK suppliers of kits, I would want a kit as messing around with the dog-bone mount is not something I would want to do, this would mean finding an import source, have you any links to the HiWin stuff??

I will also need some end plates as I want to get rid of the old 6F power feeds I have on X&Y.

The main restriction on ANY donor machine is the height - this cannot be any taller than a standard BR2J2 manual machine, maybe 2-3" max then it would not fit in the shop

I was guessing on 2:1 reductions for servo drive, I cant see much point in blistering rapids on an old machine.