Trying to find why I am getting extra density in my negatives I climbed inside by old 8x10 Ansco with a flashlight looking for that bad holder. Nice ASSumption, but wrong. As it turns out, I have light leaks at the wood seam between the rear standard assembly and the film holder as well as between the lens board (lens board is thin plywood) and the front standard assembly. Am I looking at a lot of sanding to get the surfaces to meet properly or is there some gasket (tape, felt, whatever) that will work. Thanks for all your help.