I just broke in a Thunder Tiger Pro .61 a couple weeks ago, and was really impressed. It has to be the fastest break-in I've ever done! I like just about anything that runs well, but I have to say I am really impressed with the value and quality I have seen in the TT engines. You can find others that will out-perform the TT 61, but will pay more for them. There was a "shoot-out" article in one of the mags recently, it might be worth your while to check it out. (Help me out here guys, which mag and what issue?)
FP