A friend of mine offered me a tee dee .90. The more we talked he has a Norvel .061 he'd sell me also. How does you opinion of a .061 wasp fit in with these two? I'll probably buy both, but just wondering which is the perfered engine for performance, starting, life span etc. If you had to choose only one of the 3 which wouild it be and why. Seems like there have been a lot of positive Norvel comments here.