Quote Originally Posted by ggriffi
I just feel that the 3/8" thumbscrew would be a little more stout than the 1/4" thumbscrew. Thats why I wanted to go with that one.

I use the 3297 large plate (supplied with both 1/4" and 3/8" screws) for my 5X7 Eastman and 4X5 Toyo cameras. It will fit any head with the hexagonal QR system.