World’s sketchiest setup. Shapeoko is resting on a stack of paper boxes, electronics are in the lid of a paper box on another stack of boxes. Connected to the computer (running the LinuxCNC Ubuntu reroll) via quick and dirty pin-header and cut cable parallel port breakout plugged in to breadboard. Powered from a cheap ATX PSU with the sense pin jumped to ground. Good enough to drive the Z axis into place and do a bit of testing.