Hey Krayzc: I had a BME 100 on an Aeroworks SU 31 which did some of the nonsence your describing. Mine kicked back once and sheared off the 6/32 hub bolts in the prop driver. But the idle thing was always there with this engine. I just went with long drawn out approaches while landing. I eventually sold the plane and along with it I threw in a Mejzlik 26-10. The new owner put the Mejzlik prop on the exact same set up and the motor instantly became happier. I attributed this change because the Mejzlic was a heavier prop than the Menz 26-10 I was running and it just seemed to settle in better coming back to an idle. In my head it seemed like a flywheel effect or like the extra load from weight of prop made a difference. RPM came up on hi end also. I always run Menz props but the Mejzlik made the difference on this one and your situation sounds pretty familiar with the one I had, hope this helps, Walt