I have 5 of the TT46 engines and one 42. They are fantastic. Put a Tower Hobby muffler on the 46 and you have a real powerhouse. I had one problem with the first 46 I bought that I caused. I sent it to Ace and they had it back to me in perfect condition in 3 weeks with no questions asked.

The TT 46 is easy to start, easy to tune and idles at a lower RPM than any engine I've ever had with instant response when you hit the throttle. A number of guys in our club have the TT 46 with no complaints. I'd go with the TT.