Well, I bought 2 11x6 MAS, & 1 11X6 APC. When I got to the field I found out that niether would work with the adapter nut I had on my spinner (Dave Brown). The MAS was too thick. Need a shorter adapter nut. And the APC was same way, and wont work with the Dave Brown spinner. So I ended up using the 11x5 wood one I had. Well, all said and done, I didnt care for it, at all. Most of the guys at the field fly 11x7 on their OS 46 FX's. After I got home (with snapped wood prop...long story), I put the 11x6 APC on and put the original spinner back on. It will be a week before I can try it. I was afraid to just jump right up to 11x7 after not trying the 11x6 APC.