I have the MK3 setup. I've tested to make sure all the filament loads and unloads properly in mode 2. Prusa is setup with the profile from anycubic with the added extruders like in Bill's videos. The problem is when I start the print, the first loaded color prints fine but when it comes to touching the switch to change the filament the print bed doesn't move and it stays on the switch. It doesn't move the 3mm off to stop the pulses. It just stays there for about a minute with the pulses incrementing, then it moves off the switch to the back of the print bed like its trying to change out filament but nothing happens.
I've adjusted the position of the switch in the gcode generator thinking maybe I measured wrong and the 3mm movement was happening but not deactivating the switch, but it makes no difference.
I started off trying the mode 3, that was a mess so I thought trying mode 2 with only two colors would be easier with less variables to deal with.
What does your tool change gcode look like? And where is your switch located?
Bill