This is a very timely thread as I am just at this stage with my ailerons.
Using page 22-06 I clecoed together the spars, ribs, leading edge and skins in the order suggested.
The next step was to lay the aileron on a flat surface, check for twist, and then drill on the trailing edge piece.
Knowing that some others had experienced a twist I thought that I would check my work on the wing and discovered that there was a twist in my aileron, one that was not apparent on the flat table.
Typically when I line up my ailerons and flaps I " clamp" them to a long straight edge to make sure that they line up properly. Here, they did not. You can see that there is a misalignment and it would be about 1/4"
By removing some clecoes from the top surface of the aileron spar and clamping it together with the angle I was able to get the trailing edge to line up properly with the flap. The clecoes were then put back in place on the spar and then the trailing edge was drilled in this position, on the wing. The angles held every thing in place, properly aligned.
Here is a picture of the trailing edges, drilled and aligned, on the wing.
I will carefully check the alignment as I am riveting as it is quite possible that a twist could go in at that phase of the construction.