OK! So I did it, I'm now and Ultra Large Format Photographer ... (with a crappy pinhole camera that needs... some work).
Looks like I didn't have any light leak issues, but I DID have some uneven development in the center (as well as tons of trouble working with such a large sheet in the dark and loading it, leading to scratches etc, but hey, first time ever making my own camera, first time using a pinhole, and first time using anything larger than 4x5, give me some slack...)
The MSA is cheap cameras and cheap film... the TOTAL cost of this 11x14 image ...
11x14 x-ray film ($30 for 100 sheets= $0.30 per image!!)
Cardboard box, tape, flat black paint, FREE courtesy of my parents.
20cc's of Rodinal ($13/ 500ml bottle = $0.52 per image!!).
$0.30+$0.52= a whopping $0.82 camera!!! In 11x14!!!!!!
Beat that!!