hey sourkraut,
i finally got the gms .61 on there, had to buy a new motor mount though. its funny though motor mount included it was still cheaper than the O.S. version. it fits nice i'll get some pics soon. did you have any problems with breakin. (i ran it a little above idle for two tanks.) this is my first ringed engine, and at full throttle it sometime cuts out. its like the fuel just shut off. i did read another post somewhere in this place about a 47 with a similiar problem and he put baffles in the muffler. but that kinda defeats the purpose of that tuned muffler. i believe you have the same style. i did have to had a little weight to get it to balance, im at the 5 3/4. the forward most cg point not real happy about that but at least its not falling back on its tail anymore. i also put a 11x7 with the same truturn spinner as before just had to buy an adapter for the thread size. i cant wait to see this thing go, but a little nervous about the engines intial reliablity. any thoughts?