In the early days I made a kit of parts for the X3, this was before the SX3 came out in earnest. I made the kits and sales were handled by Arceurotrade.
Off the top of my head either 37 or 42 kits were done and they worked out well.
had a few queries but no actual comebacks which I though was good.

At the time these used Ketan's 220Ncm stepper motor with the 10mm shaft but used the larger 80v drivers running at 72 volts and downrated to 2.5 amps.

The idea behind this was that it would have the voltage for speed but only be ticking over regards amperage for reliability. X and Y were direct drive through Oldham couplings to a 4mm pitch screw.



Z was the same motor but running the same screw via a belt drive 2:1 reduction inside the column.



All ballscrews ran on matched precision sets of angular contact bearings.

No grandfather clocks were injured in the making of this conversion to rob them of the stupid standoffs that some like to use.

If I were doing the same kit today I'd do exactly the same but replace the 220Ncm motors with Arc's 300Ncm type 23 [ often called a type 24 because of the larger case ] motor which was not available to us then. Still continue to use the larger drivers for reliability.

I see no advantage to going to the larger 34's on a machine this size.