Aileron pre-assembly.
Set the 2 keeper rivets in the bottom skin to the ribs. These have to be drilled out later. Didn't mash 'em all the way down.
Then clecoed the leading edge skins to the bottom of the spar and the bottom skin. Flipped the assemblies over, hung the bottom clecoes over the edge, and weighted down the trailing edge so it would stay there (The CG of the assembly is forward of the spar).
Then started pulling the leading edge top in place to allow clecoing the top to the spar. This is a difficult task. Used the Smitty method of using duct tape to hold it in place, then slowly working each piece of tape tighter and tighter until the holes can be match up by hand. It's impossible for one person to just pull it into place with just one hand, and cleco with the other. Two people might be able to get it done, but three might be better. One person can manage with the tape method.
Once the holes were close to lined up, I could push/squeeze with one hand, and get a small punch into one of the holes. I then repeat the process with another small punch. Then a cleco will go in. Then it's just a matter of working the punches down the line a hole at a time, filling in every other cleco.
The right aileron started out much easier than the left, but finished very difficult. The left got easier as it finished up. The conclusion I draw is that the counterbalance rib assembly must vary a little in depth, and it's very critical to get it right.
