Steve...

Yeah, this was the 2nd time I flew it. Was fun. And much better with the engine attached. I checked everything over last night and it all seems tight and good. So maybe I have that problem solved.

The boggy engine in inverted flat spin does bother me a bit. Now I'm wondering about the fuel tank vent. Maybe you can (or someone else) explain it to me. I have the vent in the regular place in the tank with a hose going down the landing gear to the outside. When I'm right side up everything seems good and the tank would be vented. But...when inverted the fuel would cover the vent line. Correct? So...is the tank vented? Could this be part of the boggy feel? Any way to change/correct this? Does anyone think that would be a problem.

Just thinking. Sometimes you can overthink a problem. Another solution...just break the engine in and lean it down and go to the leaner oil mix.

Thanks
Barry