I have completed a couple of previous projects and am now ready to start on my quest to build an affordable film holder for ULF cameras. David Goldfarb was kind enough to send me measurements from one of his, but I would like to have a commonly used holder in my possession to compare fit in a used back I recently purchased. My own 11x14 camera uses a back of my own design with film holders i designed that are non-compatible with standard holders. Thus my need for a "standard" holder. I would pay shipping back and forth if anyone wants to loan me one for a couple weeks. I will mail you a replacement deposit before you send it. Or, if someone has a cracked or mangled one I could buy that off you for a fair price. When I am done I will send you one of the prototypes to evaluate, and if you like it, you can have it for the cost of materials.