I like the idea of flash into a bundt cake pan. I might try that and also some variations on the white card - maybe aluminum foil. I will photograph some very small cactus plants with tiny hairlike "spikes" that I think will benefit from side/backlighting against a solid black background. I know the result that I am after. Now I have to figure out the procedure to make it happen. When I get the first few done I will post in the experimental gallery with 2 or 3 different lighting setups on a single subject.