I have been working on a 1948-ish 8x10 Eastman Kodak View Camera Model 2-D. I have it mostly disassembled but cannot figure out how to separate the bellows housing - the rear box from the rear tilt pivot points. Do those things unscrew some how? or were tehy considered a destroy and replace type part? Also, how does one remove the rear swing lock? The threads are peened over to prevent the knob from falling off....do I grind/file off the peened over part? or...????