thanks for reply Hood,
I have looked at even changing the encoders on the red cap Fanucs that come standard on the cin sabre 750 but that is getting to be a bit too much really.
My issue is that the controller is on its way out (works when it wants to) and replacing it would be in my opinion a mistake as I have had enough of standing at that Q!"$ยงยง$ console typing in gcode. I would like to be able to use mach3 (by the time I am ready Mach4 should be out!!!) to run the machine due to its wide support and versatility. What I do want to avoid though is loosing accuracy and speed. From what I have seen with other machines is that they are quite slow until I watch your link. That is really the first machine that I have seen of that size powered by mach3.
I have a post of the build on cnczone, would be great if I could pick your brain along the way!!
Sourkraut