""Please give me any info anyone has"",,, IMO, get rid of that Zinger, get a good named prop like 3W, Menz, Bolly or anything just get rid of that Zinger..

carbon props,, you may get more RPMs you may not,, I have seen my friend get a increase of 690 RPMs on his old Sachs 4.2 with a Bolly carbon and he went larger diameter (same pitch), on the other hand I have read that other guys did not get an increase in RPMs while swapping to carbon (same size)..

Jim