Thanks; maybe I'll try a 12x4. It's pretty amazing at how much of a change one inch in diameter, or one 'degree' of pitch can make.

I really enjoyed how my plane climbed and looped with the larger diameter prop. Maybe I'll get one of those aluminum nuts instead of a spinner so I can make frequent prop changes; I have a flying buddy that likes to play cat'n'mouse at the end of a day, and I need at least a 5 or 6 pitch prop for that