MMU3 Grommet (Left & Right) for Original Prusa Enclosure

This 3D model replaces the grommets from Hinged Lid kit.  They give guidance to the tubes from the MMU3 out of enclosure in a downward and toward the center of the enclosure.  These grommets should probably be a part of the base enclosure kit.  I am unclear how they pertain to the hinged lid.

The model is just the left-side part.  The Slicer File contains both the left and right versions.  Remember to copy and mirror the part if you make your own Slicer File.

If someone wanted to do a remix, a totally filled (no tube holes) version might be handy, for those concerned with complete air tightness.

I took the original STL file from @Prusa3D and did the following:

1. Filled in large opening for routing tubes.
2. Created new curved and angle tube holes for the tubes from the MMU3
   1. Tube holes contain feature to give very slight grip to tubes as they slide through.  You may need to adjust them according to your printer.
3. Added fingers to the back to keep the part in place while you fasten it in place from the inside.
4. Added cutout for square nut to be added instead of the hex nut on the outside, which tended to pop out as soon as the screw touched in from the inside.