Print suspension
This is a simple system to get a flat print on the wall.
Just glue the round backside pins on the print and also glue in a 5mm rod to connect the other parts.
I printed it on a Anet A8 with 0.3mm ant very fast speed, so the clips klick in the pins, but if your printer is better, than you might need to adjust the gab.
Update: Fixed the polyhole and made the gab tighter