Hi Bernie, I spent yesterday helping a friend get his Cruisair ready for annual. When we got to the ailerons I thought that they looked great. Nice and flush with the bottom of the wing. but 2 of the brackets were loose. Since there are inspection holes in the front side of the spar at each bracket location, I just reached in and with a small 3/8" and took a 1/4 turn on the nuts and expected results. I am very leary of crushing the wood so I did a little at a time ,and got no result. The bolts were turning and not tightening. One bracket had an inspection cover over a small 2.5"hole behind the spar so I was able to get a socket on one of the bolt heads . The other bolt head was almost impossible to reach. I was able to jam the head from turning with a bent screw driver. The outboard bracket was loose so we cut a 3" hole just inboard of the bracket and could reach one bolt head but not the upper one. The upper skin is too close to the bracket to get a socket on the head. I got the lower one snug and I think I got the upper one a little better, since all of the wiggle is gone. This was not a fun or easy job. If it needed shimming, I am sure it would have required larger holes and more swearing. If you cut the hole directly under the bracket, there is no chance of reaching the upper bolt head. There is a rib just outboard of the bracket, so the hole needs to be on the inboard side. A 1/4" drive 3/8" thin wall socket would have helped(I think). The flap gap seal that I mentioned a few days ago turned out to be part of the wing walk wood, Someone had rebuilt the wing walk with one size thicker plywood and extended it out an extra inch to form a perfect flap gap seal. It is a nice strong wing walk. I am going to have to use a piece of aluminum to do it on my plane. As Dan said DO IT NOW, while it is easier. _____Grant.