The wag could be your just right on the edge of your rate, and need to lower it by a couple clicks. The noise almost sounded like normal two stroke sounds, but not really. When you were close and it was at an idle, that was a normal sound. I would be checking every gear, belt, and anything else I can find. Last thing you want to do is have this thing fall out of the sky. You know all too well how much that costs lmao.