Hi, The following film holder specifications were recently pointed to on an earlier thread in this forum: http://home.earthlink.net/~eahoo/filmhold.html I'm wondering if anyone has the specs for 7x17 holders? I'd like to attempt making a 7x17 camera but would like it to match any applicable current standard. If there is no standard, I'm hoping someone might be able to supply actual measurements (width, length, distance to light baffle tab, distance to exposure field, T-depth, etc.) from an existing holder they may possess. Thanks.