Borrowed one from my friend thats hex and threaded the guy he bought it from said it was a big blade but it didnt say 12.25 x 10 in the back it was just etched in the front 12x10 .. Put it on my gtr and lost 5 mph with it and the gtr prop was worn out motor is still running the same rpms has no launch motor just revs up and takes forever to plane out ... Anyone else ever run one