I know I am stressing over something where the fix is pretty simple. I now have 10 flights on the engine and plane and the first 7 flights were perfect. Engine ran great and on the 8th flight it quit while flying and I haven't been able to get the mid-range where it is smooth. Great idle and top end but middle sucks. JediJody has been a great help and I intend to lean the engine out even more tomorrow. I just thought the plugs would tell me more about what's going on. Since this is my first twin, I am being a little careful about it overheating.