Used the stock control horn and drilled as necessary. Used a little CA in the holes to beef up the balsa. The rudder needed nothing and I used standard servos and a 2-56 rod. The rudder is incredible effective on this model. Remembering back to when I built it, I also added a couple of cross braces to the fuse area to keep it from collapsing when lifted. You will enjoy how the plane flies and handles. Its a breeze to land and do touch and go's with and does some crazy aerobatics. In a light breeze you can almost walk up to it and carry it off the feld instead of landing it! I routinely landed acrosss the runway in crosswinds and it only takes a couple feet to roll out. Same with take offs in a cross wind...blip the throttle and you are off the ground.