Flew the Suk today with the Amsoil mix 2000 racing series at 64/1 , all i can say is WOW what a difference . Motor of course is breaking in a little now but the midrange is much better with no excessive burble and stuttering. I switch also to a NX 22/8 prop and it really sings the 3.2 I am happy now just thought i would voice my opinion.