It would be nice to have a glass carrier for my 4x5s just in case I need one someday. There are just so many drawbacks to using them: there are 6-surfaces to keep clean instead of two, negatives are subject to Newton rings unless the environment is very clean and very dry, I can literally throw my empty DII carriers on the shelf with no regard to damage, and I can, and have modified them (Oh Boy!)

Truly, dr bob.

"I've filed this thing three times and its still too big!"