Works great! Plenty strong.

@Michael_O thank you very much for the Rating and the make.
Can you share the model as well? Would make it easier for remixing.
@Mesmer_178008 Uploaded it a few seconds ago.
Made it with FreeCAD.
I use it as intended but I also hot glue it to the internal top of the frame if I want the nail to be higher. (This also avoids the PLA bending over time from the weight and temperature)
@Kunzite Thank you for your rating. Yeah I also thought about glue it to the top, but I didn't do it yet because I'm not a big fan of glue. But good point, now I need to check if they are bending.
@PennybridgePioneer To be fair it seems pretty easy to remove if necessary since the material is HDF and it doesn't seem to be very strong with hot glue :) Thank you for the design anyway! it's a big timesaver :D
Works perfectly. Thank you!
I saw your design when I searched for a solution for my RIBBA frame. Unfortunately the dimensions of my frame are different to yours... So I made a remix and uploaded it here.
Thank you for the inspiration 🙂
Thank you for the comment/rating.
Your design looks very nice.
Worked perfectly on the first print. On the 12x14 frame with 8x10 opening, it's a nice pressure fit. It's slightly loose on the 8x10 frame with 5x7 opening. Depth is perfect in both cases. Thanks!
Thank you for the comment. I used it with the 13x18cm (5x7") frame. Sometimes you have to slightly bend the metal piece. (edited)