About this 3D model

I designed this hanger for my projector screen. I added counter sinks to the holes so the machine screws don't get in the way. I am using 2 inch #8 - 32 machine screws for each side and 3 inch #10 - 32 machine screws for the hanger and connecting them to a bracket I purchased on Amazon (Universal Projector Screen L-Bracket Wall Hanging Mount).