Quote Originally Posted by shutterfinger View Post
From the back mark the bellows opening. Remove the material outside of the bellows opening mark leaving a 1/16 - 3/32 thick lip between the bellows opening and outer edge of the board so that the board just sits into the front standard and the board locks just slide over the board.
This is the part that I'd assumed wasn't feasible---getting that thin lip between the standard and the locks, without thinning the wood so much that it's a break waiting to happen. But if there's that much clearance...I've pointed my captive woodworker at this thread and I'll see what she says. She has a mess of thinstock available in interesting woods and historically has done a fine job on Eastman 2-D lensboards with it.