I have a TT 61 PRO and love it!! I have had it for 3 years now and it has been in three different planes and it is still running strong. Even after I had a hard crash it seem to run better. The only problem I have seen with them is they like to run backwards when they are brand new. Besides that they are great running engines, as far as I am concerned Thunder Tiger is the only glow engine I will buy.

Scotty