A huge thank you to everyone for your help! This is a DIY 8x10, and is really just a prototype/learning camera. I will take the lessons learned on this and incorporate them into my next (and final!) build. But, I've been stumped on the bellows now for about a month. I will try making a new bellows and size it to pass *through* the bellows frame. I will then screw the front and back bellows frames to the standards.