As it turns out the camera has screws and the extra back I bought has bolts. I went to the hardware store and bought stainless steel socket head bolts and captive nuts, the kind with the barbs on a flange. Since the back is wood and there is a plastic plate, the back is sanwiched in between. I'll try it out on the extra back I bought. It looks pretty good though. I could even put a stainless steel spring on bolt between the head and the outer side of the spring. If it was stiff enough it could be a set and forget setup. It would act as an overload spring to allow larger holders that extra room. I want to avoid a dirt catcher and a clothes ripper though.