[quote]ORIGINAL: frenchie79

The Pro 46 is the only one I've seen run decent. Very comparable to the OS 46. Seen problems with the 61, air leaking around the bearing and service company unwilling to fix. Felt sorry for the new flier. I let him use a Tower 61 i had new in the box. (Still have it if your interested, 46 AX's also)

Well, our club puts on club 40 racing and all of the engines involved are TT Pro 40's, which are the legal engine for this event, and they all run very very good.