I think your idea is sound especially if you replace one of the 4 "screws" with a hollow stud. It can hold down 1 corner of the shutter and serve as an air passage as well. I just scored a beautiful old Century Studio 810 with a useable Packard in place behind the 42cm Heliar. Now I'm looking for one of those giant antique studio stands on 3 wheels if anyone knows of one.