These are interesting points to consider. Thanks. Evan, what I'm really curious about is what factors affect the spin exit. As a physicist I look at this as an interesting problem in aerodynamics. I'd like to understand why this is happening, i.e., why the different models have such distinguishing characteristics. Of course, one possibility is that there is no single dominant cause and the effects are due to the combination of small design differences. But it is still an interesting topic to ponder. For example, the new Cessna Skycatcher had spin recovery problems in certain extreme configurations before modifications were made to the design.

Jeff