Just found out that for the X2, Kit#4 includes and upgrade of all three axes to ballscrews. Lookin' pretty nice there, may consider.

So the only issues left are:
- Making sure the HM-10 is equivalent to the X2

- Getting steppers of the right frame size (NEMA23) and torque (? oz-in)

- Figuring out how to do the retrofit, hardware-wise

- Figuring out how to get EMC2 to work with the Gecko G540, incl limit/home switches, E-stop, Aux devices, the works

- Figuring out how to convert PTC Pro/Desktop designs into G-code, accounting for cutter shapes and dia as well as machine size.

Any ideas?