The Spectrum machine doesn’t have any physical controls, but benefits from having a PC nearby in the shop, so the loading, and calibration, and starting can be initiated over the wireless (XBee) link.

If I needed it tomorrow, I would cobble together another one of those “hoofer doofer” machines, maybe with an XBee so it could be hidden away somewhere hard to access (away from prying fingers).

If I needed it next month, I would wait until the polarshields are fully cooked, and use that with the touch-screen. I might also think about using spring-loaded take-up spools instead of counterweights to give people less opportunity to knock it out of alignment.