hey im a new coiler and havnt even built an actual coil.i a 3by3 incher though!it put out 1.5 inch sparks.it was powered by a 1250volt3.5ma he-ne laser supply.hopefully you got the hints that i dont know what im doing.i just orderd a couple of 7.5kv30ma transformers and im building a 3 by 18 inch secondary.can you help me by telling me the dangers such as electricution and things never to do and how loud is this?