NOTE: Because this upgrade requires a change to proximity limit switches, only machines with the Carbide Motion PCB version 2.4 or higher are supported. If your machine is newer than Feb 2017, it's probably got a supported PCB. If you have an older machine, or you're not sure what board you have, get in touch and we'll try to help out.
For the legally-obsessed out there, the Shapeoko, Carbide Compact Router, and cutter shown in the photo are not included with the Z-Plus. But you already knew that.