Dru thanks for the advice... I've leaned the low end until it stumbles in transition(about 1/2 turn open), open it up just enough to allow transition to the highend and I still have the mid-range problem, it simply wont run any leaner on the low end than I've had it. you say you run the thunder bolt plug...maybe the plug the Magnum recommends is worth a try I tried thunderbolt plugs YEARS ago, didn't like the way my engines ran on them so I've just stuck with what I know... I'm also going to try a different prop[:@] I really hate to do this... that APC pulls the snot out of my plane and turns up real nice, It could be a load problem in the mid range though so I suppose it's worth a try.

Thanks
John