Yes,
I have the MK bellcrank on a pattern plane, and it is a very slick, smooth, and reliable setup. I am, however, very concerned about tail weight on this plane. I am planning on mounting the elevator servo below and aft of the rudder servo, or barring that, I will use 2 hitec 605's, and just use dual elevator servos. I will explore that possibility more as I get to that point in the building.