I'm finishing up a GP Wagstaff 1/4 scale Extra 300s with Moki 2.1 for power and am trying to find the ideal propeller for IMAC style aerobatics. Anybody out there flying this combination? Let me know what works and what don't.

I did some web browsing, and I found that the Moki 2.10 is supposed to produce it's best thrust on a 20X10 prop, 26 lbs to be exact.

Appreciate the input Jack. I've heard the same thing, that the 20x10 is the way to go, but there seems to be a lot of variation between brands. I've heard 20 pounds thrust on the Bolly and as high as 26 pounds on the Moki prop. I've also heard good things about the Menz S and APC props as well. I'm hoping somebody has tried a lot of different props and has a pretty good idea which brand is best for my style of flying. That will save me a lot of experimenting and a few dollars, as this size prop isn't cheap! Anybody have any specifics?

Well, I've got a Mejzlik 32X10 on my 40%, and it's great. It isn't as heavy as you'd think a carbon fiber should be, it's quiet, and it doesn't seem to flatten out or flex alot when you hit the power. I know it's not the same size, but I'm assuming the Mejzlik 20X10 is just as good. I've heard Bambula props are pretty good too although I don't have any experience with them.