i am new to nitro, and just got a t maxx. it has the .15 in it. anyways, i was told the high speed needle needs to be set 2 1/2 turns out, but it won't run unless it is like 4 turns out. it is also guzzling the gas.i noticed that the gasket for the header is shot. is the conpression the prob., or low speed needle. what is the low speed needle supposed to be set at?