Matt,

Something else I did - which concerns the issue of erratic running/sagging when doing an outside loop - is to put a "static line" (if that is the right term) on the little ambient pressue plate (if THAT is the right term) to counter the pressure changes in the cowl that I suspect cause the erratic running. This worked before when similar issues were encountered with aerobatic models.

Depending on conditions tomorrow, if it isn't too windy and one of the fields where I fly is clear of snow, I will try to get in some more flights. At the very least I'll run the engine some more.

My soldering isn't the best (use one of those little butane torches from Radio Shack) but it is solid and clean.

Also I noticed that the header bolts were loosening up, so I drilled through the bolt heads and made a little "clip" from 5/64" piano. Don't know if this will work either, but it's winter and I am trying to do this since I'm not flying much!