I ran with the Hitec 59XX servos. I have HS5975's on the ailerons -- but I think Hitec have discontinued them, so it would be back to the HS5925s for ailerons and elevator (I mounted in fuz, not in stabs). I used the HS5945 on rudder.

They fit in the pre-cut aileron servo holes. You just need to use slightly bigger screws, than the standard Hitec ones.