Thanks and thanks again - the VFD wiring will save me some time and head scratching.

I've done a few moves in the MDI in mach4 (I like how in mach4 you can enter multiple lines in MDI and then hit the cycle button to run them), much like you suggested i.e. x50 x0 and all seems to be good, but will do some longer tests with repeats in gcode.

Now I've got movement I'll be buying the mach4 licence and then I can run some decent test jobs (unlicensed is limited to 20mins iirc).