Creality CR-10 (2020 aluminum profile) stylish back mirror holder

Holders for a mirror of about the bed size on the back of the printer to see what it's being printed from the back side.

Each holder have a sliding fit that clamps the 2020 (20 x 20 mm) aluminum profile from the printer's base frame, and another clamp to hold a 4 to 6 mm thick mirror standing up, matching the printer style, leaving enough clearance for the bed to travel backwards and for printed leveling wheels underneath it.

The first STL is the holder that should be printed twice. The s