I am using the H9 accessory kit with the very robust Dubro linkages. The instructions say to drill the aileron control horn hole perpendicular to the centerline of the aileron. If I do this, the "A" nut will not sit flush on the surface. In the photos, the A nut magically sits flush with the surface. I could do this and not use the A nuts or drill perpendicular to the surface and use them. Also the hardwod block seems to be off, and if drilling hole as per instructions, I would be drilling through the edge of the block. I was considering using sullivan control horns. Any advise would be appreaciated.