For ages Ive just been using two filaments with little to no problems.
Finished my Lack enclosure so popped the printer in and attempted to load all five filaments and print swatches. Failed trying to print filament three. tried various things before removing it from the enclosure and started to strip it down. Seems the blade in the selector has cut a groove in the guide and its jamming at the end of that as it sweeps the blunt edge from one to five.
Played about with it and managed to get it sliding fine. Put it all together and same again! Sticks.
Does it really need that blade in place? I think not.
This MMU is starting to really piss me off.