Finally got mine installed and running. I had 5 flights today with a noticeable improvment in the lack of vibration. The plane sounds completely different. I have very little shake at idle and no rpm change. I loctited the pipe in the engine and used teflon tape on the pipe in the muffler, everything stayed tight. I WILL use this mount whenever I use this engine. One of the best $60.00 I've spent.