I also used a sato72. I used a 13 x 7 it seems quick with this prop . I ballanced it at 3 7/8 without adding weight(battery waayy back in the fuse) also ballanced latterally with out adding wing weights. Even with the ballance where it was it still didnt want to slow down to land. I think I'l try the flaperons on a calm day. with recomended throws it rolls just as fast as my somthin extra :spinnyeye Its only got one flight on it and I allready love how little the wind afects it.