OK, I understand allot of you used the standard hardware that comes with the plane and have not had any problems. My question is for the ones that have used the other control horns that go through the top and bottom of the control surface like the Dubro heavy duty horns or the rocket city horns. What did you do about the hard spot that is only on the bottom of the surface for the horns that come with the plane? With the Dubro or the Rocket city you need a hard spot on the top and the bottom