Hi -- I'm trying to use 1/4" copper tubing as my primary coil, but it isn't working well. I can't get it to bend smoothly - it looks pitiful. Would it work to use some really thick copper wire? If so, what guage should I aim for? Thanks Christopher Michaelis cmichael-at-xmission-dot-com Pretium Corporation t:(435) 797-4100 f:(815) 364-1274