Everyone I know has had bad luck with Tower engines but then I don't know everyone. I've heard good and bad on RCU forums. If you are going to go with a .60 try the OS LA. I know that statement will create a lot of flak. OS always has had good carburetors. The same cannot be said for Tower engines. I support Tower in almost all cases for everything they sell but the engines I've seen personally can't quite cut it. Even Clarence Lee doesn't say much good about them and he is usually very generous with his engine analysis.