I was having a heck of a time trying to do my 4-color 3dchameleon install on my Ender3 V2 using the "classic" method, where the chameleon extruder simply loads the filament into the primary ender3 extruder, but the primary extruder is what is used during printing. I decided that eliminating the primary extruder and using the 3dchameleon as loader/unloader AND extruder was just going to simplify everything from the gcode to having one less step to go wrong. I followed this video (linked from the FAQ):
I think I've finally got my gcode figured out, and I'm able to successfully load and unload a single color (lets say extruder 2). Unfortunately, I noticed that when I use the same gcode on extruder 1, the extruder is moving in reverse.. which probably makes sense since one of the gears is on the opposite side. I realize I could just swap the extruder instructions in my load/unload by swapping positives and negatives, but that won't help during the actual printing where I might be switching between colors during print. How would I be able to have the extruder direction "inversed" for 2 of the 4 gears, using the above configuration?