Hi there, I’ve just done a tcl160 Mach 3 conversion. I used a gecko drive G540 and replaced the boxford electronics and drives, but used everything else including the lenze spindle drive, existing steppers (apart from the tool changer motor, which wasn’t working), limit switches and spindle sensor. I did replace the spindle encoder disc with a laser cut version with a single long slot. It was a pretty straightforward conversion, with just a couple of relay boards and some wiring. Let me know if you have any questions.