You guys were absolutely right! I just got in after running one full tank at full throttle. I took the baffle out before trying. Guess I'll try to take a closer look at the baffle another day to see if I can put it back in and still have the engine running fine and with better noise reduction. I'm curious as to why my hobby shop didn't suggest this before giving me a new engine to try out. They too will be wiser tomorrow.

Thanks again!

By the way did any of you do any special breaking in of your EVO's? Would you recommend breaking it in or skip it and make it scream from first flight?