Sounds like fun, Bobh!
Im thinking of making a fixture out of wood strips, and using some picture frame glass. Im trying different lenses, as well. Im using a Nikon D7000. I dont have a macro lens, but my 70-300mm telephoto is working with an extension tube for close focus. seems to work OK, but focus is a bit of trial and error. The tripod helps ALOT! good tip about the black. some black barbeque grill paint should do the trick.