it does do good HA knife edges- better than the edge will do for sure. the cap will kick trash on the tumbles too. the rolling circles and 4/8pt rolls nothing special for either airplane of course. It just warmed up here (a little) so maybe i can try to fulfill your desires on film in the next week or so. i don't know about a low invt. harrier thou- i'll have to see if i can trust my engine that much. did you see this video already?

http://youtube.com/watch?v=4Hy1114F3wA