Take a look at the laminated props that PAU is selling. I tried one of their 26-10s on my RCGF 100 and was very surprised how well it worked out. My opinion is that it performewd better than a Menz 27-10. A bit heavier than the usual wood prop because of the laminate, but it's as stiff as a carbon prop. I think you might find the experiment more than worthwhile.