Photo frame

  I prefer a more reliable setup, so the foot uses two M3 heat-set inserts (4.5×4.5) and M3×7 screws to attach to the frame. The foot design is borrowed from this 3D-model. 

 The 3D-model is designed for a picture size of 160×110 mm. Locking a picture inside the frame should be clear from the design. 

  There is a STEP file as well for adjusting it to your picture dimensions.

  Update: The lock plate now grips both sides of the frame. All back plates are now identical. A 0.1 mm clearance has been added between the back plates.