Like the French cleat mounting system? Then use it above your printer. This is a 3 part design, no glue or hardware needed eh!
YouTube video:
Place the two sides on the print bed so the tubes face up and the screw should be placed flat side down. No supports needed.
What is a french cleat?
https://en.wikipedia.org/wiki/French_cleat
The author hasn't provided the model origin yet.