It took me the best of Christmas holidays trying to solve all my various MMU2 Problems.
Techsupport (which is excellent by the way) did what they could but still two major problems are not solved.
The major problem is MMU2 single mode. By using this and believe me I did 5 factory resets, install of various firmware and slicer versions and still there is nothing like the cool down move with nice filament retraction done in single mode.
Trying everything I gave up and sorted to this solution.
I have designed a one layer 1x1xm object and add this to any single object print I want to make. Then I choose multi material printing and assign different filament (the best Filament No.1) to single layer object.
A waste tower is made of exactly one layer AND at the end of the print a correct cool down move and filament retraction is done.
That's not really elegant but there was no other way I found. Because Filament stringing residues in Single mode was already blocking FINDA
Does anybody have the same problems, What are your solutions?