My 46 Aviastar has turned out to be a sweetheart so far. It broke in nicely today with a half dozen or so complete heat cycles. Only about 10ozs total fuel. It starts with just a flip and idles perfectly. Transition is clean and it screams on the top end. This one is going on a Nitroplanes Bobcat pusher. I can't wait to fly it. As soon as the engine has proven itself with a couple gallons in flight, I'm grabbing another one from Sig Mfg. before they're gone.