Hey guys! You're not going to believe what happened. I was putting the new .39 in my Raptor, and something fell off of it. I first thought it was a piece black plastic from the frame of the chopper, but a closer look told me it was metal and it was a piece of the ring!(about 1/4" long) I couldn't tell if a piece of the ring was actually missing, but when turning it over by hand, I noticed it would snag a bit about 1/2 way up. I stuck the damn thing back it the box and I have it ready to go back it Ace on Tuesday. I'm sure this is a good engine, because everyone seems to like it. Shavings in the engine, and broken rings don't sound good to me, but I'm going to give it a fair chance. I hope Ace pulls through for me on this one. I'll let you know! David