The replacement parts for the right aileron hinge brackets from Vans arrived today, to replace the ones that I had countersunk on the wrong sides. So the first step was to use the bandsaw to cut apart the pieces from each other and then use the bench grinder to smooth off the edges. Then I made counter-sunk holes on the correct sides, deburred the holes, scuffed with a Scotchbrite pad, and then painted with primer. After the primer had dried for a few minutes I riveted them onto the aileron spar, and started reassembling the right aileron around it. I had to finish backriveting the end rib halves onto the upper and lower skins, and finish edge-rolling the nose skin in place. Everything else proceeded quite smoothly and I was able to fully rivet on the upper aileron skin. Since I'm still lacking the VA-140 trailing edge extrusions, I can't close up the aileron with lower skins yet so I just cleco'ed it in place for now and have set the right aileron aside and next to the left one.
Overall, the need for me to redo these hinge brackets actually led me to discovering a much better assembly order for these ailerons that eliminates some of the tight spots... I'd recommend squeeze the two end ribs onto the spar first, then squeeze the hinge brackets onto the end ribs, then backrivet the top skin to the end ribs, then attach that to the nose skin+nose ribs. (Normally squeezing the end ribs onto the spar is very difficult due to its proximity to the nose ribs and the top skin.)
I also had a little time to squeeze the rivets that hold the dozen inspection panel nutplates onto the left wing spar. I used a cleco and one of the screws to center these nutplates before riveting in the first side.
What's next? There are a few more nutplates that I can rivet onto the wing spar, once I find the right size screw for them. The nutplate screwholes need to be countersunk to the right size after the nutplates are in.