I've never "shot" with a pinhole camera, but I do have some 8x10 film holders and a new box of Arista EDU 100. I'm looking for some plans for an 8x10 pinhole I can make out of foam core. Ideally something cheap that I can throw together in a few hours. The ability to take film holders is a must. I have the tools to make one, just need some plans.

To start out I'll probably make the pinhole with a very small sewing needle on aluminium foil, and shoot a sheet and go from there.

Any input?