I am interested in getting a metal field camera. Looking at the specs, I see several that would work for me. In particular, I like the Wista’s, Toyo’s and Horseman, in that order. However, there is nowhere nearby where I can go to try any of these cameras. Can anybody tell me if I will be able to use my Calumet C-2N 6x9 roll film holders with these cameras? They all seem to have wings or other protuberances on the back (do these things have a name?) that would keep the holder from seating properly. This is the case with a Crown Graphic that I have. (I fixed it by grinding down one of the wings - something I don‘t want to do with a new camera.) Thanks for your help!