I sat here and wrote a long response, saw a notice come in and now all I need to do is agree with Bipe!
The norvel 061
RIPS with a cox 5x3. Slow it down a little with the 6x2. The cox reedie's run extremely well with the 5x3. Final performance is difficult to predict because it depends on the airplane. Like Bipe says, bring some different choices and try them all.