On machines with the nano board, are the steps per mm the same regardless of laser size? I see no way of changing the steps/mm that the nano board outputs, so my assumption is all the lasers using that board would be the same. Am I correct, or is there a way to change the steps/mm?
All of the setting are in firmware and unavailable.
Laser size wouldn’t change the step rate as long as you use the same pitch diameter pinions on your update. The bed size would change of course, but not steps/mm.
Also, I’m going to start poking at this soon for LightBurn, at which point I can do scaling internally to whatever size you like. 
Been figuring out how to use WireShark, have done a few traffic captures, and started looking at the disk-based files. They’re bizarre, but hopefully won’t take too long.