Poster Corner Mount for use with (2) 3mm acrylic sheets and 0.009 inch thick poster. String can be threaded between the four corners or screws can be used to attach bottom corners directly to wall.

Built-in supports can easily be cut-off of print for perfect print orientation. Also attached is the poster corner without built-in supports.

I noticed that if I print one at a time, the print is perfect. When I print all four at the same time, I experience very rough edges on the vertical 45 deg. I've tried it twice, so I'm thinking there's a bug in the Bambu slicer when printing the .step file. I've included the .stl file but haven't tried to print it.