Barry,

I can get my Gp Da50 powered Cap 232 to do rising inverted spins as well as my 33% WH Edge and I've seen my 86" QQ Yak stop descending and just spin around it's CG. If I add power past that it will flop out, but it's cool to see it just set there going around in circles and not loosing or gaining anything, it is kinda mesmerizing to watch [&:]

And to add to your KE thing, once he's comfortable with that then do KE patterns around the field.