[David]

I've seen these blocks used before, they work rather well, so ignore corporal hicks, he is a hick no less.... just etch some small designs like i told you to all over the inside of the chamber, that will greatly increase surface area. just make sure the whole thing is copper and the top is lexan, you need the walls and base to be copper for conductive reasons. mail me if you want any more specific help, atombomb21@tconl.com