The kit from SZGH has arrived and I have set it all up, spread thinly across the floor, and it all seems to work as expected. Can run gcode, motors turn, etc. All seems quite well put together, cables well-labeled, and the only gotcha when first switched on was that the polarity of the estop signal from the MPG was wrong - you had to hit the estop button to make the machine work! Soon fixed, and I think I even have the "steps per" settings cracked for the 5TPI ballscrews (no, not quite 5mm!) and 2:1 reduction. Now waiting for someone else to get the mechanicals sorted (new control box to be mounted, etc) and servos installed. They need a mounting plate and probably existing pulleys rebored to suit but that bit's not my job!

In the meantime, I contacted SZGH about servo tuning software and I was sent - very promptly - the appropriate code. Installs and runs OK, I think - but it's all in Chinese and there's no English version, according to Mike-the-engineer. Any thoughts?