I talked to a guy in canada a while back that had a G62 on his plane also.He converted his echo61 twin and not only said his plane didnt shake apart but he thought it at least had the same amount of power,he said maybe a hair more.But he said his plane was never smother at idle.Now he might be mistaken about it having a little more power but ya never know.The nickname i was told for the G62 is [old thumper].I bought a brand new G62 to put on my Byrons 101 T-6 im building[not yet,still hanging from the cieling].I think im going to put my echo 61 twin in it instead.Im not going to madera to race anyway.My GT80 is going on my 31% lanier staudacher,[ i am working on this though].Anyway,back to this thread,im ordering the aluminum and either acetal or G10 this week.I only found 2 places that would custom cut it.