I finally won an auction for a 12 inch lens for my 8x10. Had to do it the poor-man's way, like everything in my life. It's a Bausch and Lomb in a Betax #4. The ad said the shutter "used to work, but doesn't now". So it looks like I'm going to have to do either the naptha trick or the alcohol trick, depending on what the shutter blades are made of. And if that doesn't work, I'll have to open it up. I never worked on one of these. Rather than asking for detailed advice, should I expect things to go flying through the air upon opening it? Where is the access point to the interior of the shutter? I might mention that it looks like there's no retaining ring. So that means I'll have to carefully file my homemade wooden lensboard (which doesn't exist yet), so the shutter is jammed in the hole and put a bead of hot glue around the threads. Not having a retaining ring is disappointing, but not earth-shattering. Thanks.