Some RVs have developed cracks in the aileron bracket area and Van's issued the SB 16-03-28 and a kit to perform repair if needed. It looks like most builders install the kit as it is a PITA to do after the skin is riveted on. Especially if you have followed normal rivet orientation principles by having the manufactured heads on the inside (thinnest material).

So that is what I started today.

Removal of the bracket went great with no sign of wear on the material. I am really good at drilling out rivets, it is easy when the material is thick.

The added angles interfere with the bottom skin riveting/bucking. But trimming at 45 deg is OK:

http://www.vansairforce.com/community/showthread.php?t=155919&highlight=16-03-28&page=2.