Thanks folks for all the comments. Very Helpful especially those pictures. This confirmed I definitely wont miter the corners. Good idea with the canned food. I heard old coffee tins work well too.
This pin situation is impossible. My local HW store didn't have anything better. My punch gets stuck and then I have beat that out of the pin destroying that. Tried the chisel and the pin goes flying. Driveling wasn't working but could have been the attachment I was using. Is there specific attachment that would work easily? Gonna try a couple more tricks tomorrow and see how it looks without any pins. ARg, wish this was more fun.
