This is my first coil, i am going to post my specs and if anyone has any comments on what to change let me know. thanks brad Secondary: 3"X31.25" i think 17awg magnet wire -at-635 turns 500 ft of wire primary: flat. 25 ft of .25" refigerator tubing. 5" inner diameter spaced at .5" xmformer: 15kv 30ma caps: .007uf salt water caps toroid: 3" flexable aluminum ducting around two inverted pie tins diameter of 15" i appreciate any suggestions Brad