Steve,

I have a SE with a YS 63 and the APC 13X6 is the best prop I've had on it. If you come up with something better let me know! I use to fly it with a 46fx and 11X5 APC and it was quick and twitchy. Now with the four stoke I've gone to the recomended throws (which I thought were insane when I had the two stroke on it).

RD