Original Prusa Enclosure Print Sheet Holder (Remix)

This is a remix of the excellent, well thought out print sheet holder designed by Waldmops.  This version removed the middle portion of the hex pattern and rounded the two outside corners.  Overall, the changes reduced my print time by ~2 hours.

Only the version with heat-set threaded inserts is provided here.  The heat-set inserts are M3 (5mm OD), and since the holes are 6mm deep the recommended insert length is either 4mm or 4.5mm long.  I used M3x4mm (5mm OD) threaded inserts with M3x6mm screws at locations that needed to go through both the clear side panel and frame, and M3x4mm screws at locations that only needed to go through the metal frame.