although it is not a flawless method, look at what the other yaahoo's at your field are flying. My TT pro 46 starts witha a couple flips of the finger...I never mess with it. Ever field has the "guy that sits in the pits tuning" all damn morning. I can fly 3-4 tanks before our fields "pit queen" gets in the air once. (he has a royal 60 engine) This is not an absolute method though, but, from what I have seen, the TT, OS, and Magnums are up and running, the others are "tuning in the pits". If i was not superstitious, I would get a tower 46, this one guy flies them exclusively, man are they powerful, he flies one speed, full throttle, never a problem. get a TT, or magnum, irvines are pretty too,