Don

What about trying out some of those airbrakes like Hatta uses on his Explorer

That manuver is kinda silly, there is difficult and then there is just plain crazy, I think this one falls on the latter.

In all seriousness, I cant see getting that much more breaking out of a prop to make a major difference (some but I dont know how much), probably the only way you will be able to do it is from way up and roll fast. Good thing you are flying a 40%, I dont think you could see a pattern model that high Also you should probably try to keep the hesitation between different rolling segments "brief"

Tell us how you make out.