I know they are common, but this plane is a replacement because a friend bought the original, and put it together like it was designed. It crashed on the maiden due to hardware failure. Not the pushrods, but something else on the elevator linkage (I can't remember what now, because it was a couple of years ago). WM replaced the plane for free and he didn't want it anymore, so I bought the replacement NIB. I decided to do dual servos on the elevator because I like it much better that way.