Bambu Lab Edition Modplate with closed back plate and PTFE guide gap

The three files replace the back three parts of the Bambu Lab Edition modplate. Modifications:
1. back plate is closed
2. adding an opening for a PTFE guide

I recommend printing the panels with four  (0.4 nozzle) or three (0.6 nozzle) perimeter walls in the critical areas. Add a modifier that reduces the perimeter count in the area of the backlit to 1-2 in order to save material and prevent warping.

Update 23.01.2023: Modplate_right_top: small correction by 0.7mm.