Thanks, @grainiac ! That helps a lot; however I do notice that the KP firmware from github seems to be out of sync with your suggestion when it comes to changing the TOUCH_PROBE_DEPLOY and TOUCH_PROBE_RETRACT constants -- they're defined as an array in your example, but the OpenBeam github repo has each constant defined individually. I'll just change the constants as necessary, but I worry that there might be other differences in the firmware and I'm walking into a minefield. Thanks again! EDIT: Nevermind -- answered my own question by viewing the git commit history to Configuration.h. Looks like this part of the firmware simply changed since @grainiac did the initial work. Sorry for the noise!