This is uncanny. I just installed a new throttle set up on my model III today. I had the same problem of not being able to slow it down enough by adjusting the throttle settings and still be able to get full throttle.

I did some research and decided that the only way to go was with the McFarlane throttle control that is designed for the 912.

I ordered it on Thrusday from Aircraft Spruce ($150 or so), recieved it on Friday, and installed it today (Saturday) Life is good

Louie