Alejandro, it looks like they only process 4x5 in E6, which is good because I have a 50 sheet box of Velvia which needs to be used, but I would still like to shoot B&W. How much would you charge per 4x5 B&W sheet? I will likely shoot Efke 100 films (or similar). I generally shoot a lot, so it would be at least 20 sheets at a time.
About the DIY camera kit project, if you subscribe to the feed in the blog (
http://diycamerakit.blogspot.com/) you will get updates on the progress of the project. I was hoping to have the prototype ready to bring it to BsAs, but it's not going to happen due to lack of time. I had issues cutting the brass parts, and while I think I solved them, it took too long. We should probably take this discussion offline, as it's kind of off topic here.