IMAG0251 by jmsnoopy650, on Flickr
IMAG0250 by jmsnoopy650, on Flickr
IMAG0249 by jmsnoopy650, on Flickr
IMAG0248 by jmsnoopy650, on Flickr
I have one of these i found fully working used for $12USD. It was meant for dental film but i imagine it can also be used for what the OP is trying to do. I'm just not sure how to use it yet. I was thinking it could be used to make contact prints. Anyone care to explain how to make this work for doing that? Not trying to hijack the thread, i'll start another thread if need be. Thought it appropriate here because i'm sure more of these are out there just as cheap and making the suggestion that this may be an inexpensive alternative to building your own.