I have this magnificent old camera, which works great in all respects but one: It's a 18x24cm plate camera, which takes "book type" glass plate holders. So I would like to build a new back for it, to take "modern" 8x10" (and 18x24cm) holders. I could of course build one with a removable GG which slips out so the film holder can slip in, but that strikes me as both inelegant and somewhat risky: I don't want to accidentally step on the ground glass. Does anyone know of a good resource for plans and/or materials? Wood I can find, but what about springs?