yes, and in my case the alpha doesn't have control horns but threaded eyes that the clevis hooks to. but same out come..
I think the control horn is what is mounted on the control surface. The control rod has the threaded end that the clevis screws onto.
I know increasing my throws on the alpha didnt make a huge difference, but it did help. I could ALMOST get it to hold a knife edge. I love that plane, wish I didn't sell it. I have a Aresti 40 now which I like, but everything happens so fast you really have to pay attention to what you are doing. On the alpha I could just relax and fly.