The aileron ribs needed some more filing to fit in the skin and the bottom rivets were riveted.
Rib 3 needed some filing on the lower flange to prevent the bottom skin was stuck against the flange:
Also Ribs 2 needed some modification otherwise the skin would never close:
Only the bottom side is riveted because the ailerons need a small twist for the wing washout. So when the wings are ready the ailerons will be rigged and matched to perfectly align the wing twist:
One hole in the tube is drilled and secured with a cleco with a cleco cap to prevent damage to the skins, the new in/out deburr tool is very handy for these circumstances where you cannot deburr from the backside: