Hi, anyone run this combination? If so with what results and would you recommend it? Also what prop size works best?

My Aresti currently runs an ASP61, its ok but it pretty much needs full throttle all the time.

One last question about the YS63, I've not used one of these engines before and I was surprised by the prop shaft diameter. What size is it? I assume you need to ream most props before they fit?

Thanks,
Andy