Thanks all for the advice it's helped a lot in my research.
Hi George, it was always the intention to convert as the first project been fun machining the mounts for the CNC conversion on it. Yes i was aware of you plans for the kit but quite enjoying the process of the conversion.

Think i've come to the thinking of nema23 3Nm steppers on the x-y and Nema 34 4Nm on the Z, C5 1605 ballscrews on all axis with double ballnut i'll direct drive to start of with to to see how it goes may change to being belt driven in future from Zapp. Leadshine 808 or 828 stepper drivers. Intention is to run LinuxCNC.
Does that sound like a sensible approach?
Thanks in advance
Rob