I built one, got plasma burned by it, smashed it up in anger, forgot the specs. they were simalar to your's though
that plasma burning was a funny but painful story, at least now it is. My science teacher bring his tesla coil from the 50's to school to show the class, it operated at 500K hertz, so the skin effect was high enough that it can't pass any deeper then the surface of your skin. he took a paper clip and had the short sparks comming to his hand.
when I built mine, I made sure it was in that frequency range, so I could do that. I got foot long sparks coming out of it and tried to have them come to me, minus the paper clip. hurt alot, and I don't sugust you try to do any self conducting yourself, ever. read the skin effect myth that wikipedia link talks about.
I will say it again, read the wiki part about the skin effect myth
but, if you want more information on the building of coils, here are a few places you should look at
Deep fried NeonJava Script Tesla coil simulatorthe HV community forums