How do spring backs work?

As per the advice I have received I will be sending my lens and shutter for a CLA, as soon as I can afford to. I am rather antsy to start playing with my 4x5 film, and use the Omega D2 I just took delivery of (with a gorgeous Schneider Durst Componon, almost perfect circle diaphragm ) I am going to build an adjustable 4x5 pinhole camera which can use the film holders I have. The only problem is that I have never even seen a 4x5 camera, so I have no idea how a spring back to use the holders would work. Would anyone be so kind as to explain this, or maybe even post some snaps of theirs so I could get an idea of how to do this? I guess I could just buy one, but that would take part of the fun of pinhole out of it! Thanks again,

Justin

Hi, since you can't really view an image on ground glass with a pinhole, you could just use rubber bands, velcro, gaffers tape or whatever to hold your film holder to the back of the pinhole camera.

Jon