MMU2 Selector large bore

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Update: 1/28/19
Based on feedback it is now recommended to print at .1mm layer height to reduce the chance of filament catching on any thick layer lines.

Update: 1/7/19
Added kmccon's front PTFE holder.


This is a direct remix of kmccon's work found here.
https://www.thingiverse.com/thing:3157550

You will need front PTFE for this to work properly.

I made the inlet for the selector much larger and smooth to deal with filament that just didn't want to behave. Works great. No more selector jams.