here's a recomendation for the repair,that I did on my NEXTAR when the ailerons loosened up on me.

its simple find where the tourque rod enters the aileron, then with a sharp exacto knife cut a channel in the bottom of the aileron,so it won't be seen.
follow the tourque rod to expose the rod fully in the aileron, (really a large wire) just enough so that there's space for some epoxy to fill around the rod place some tape so no glue escapes at the wing and glues your aileron to the wing.

then use some 5 min epoxy and fill the channel with the glue and hold the rod and aileron still for a couple of min.clean up any exess glue before it totally hardens carefully with a razor blade and your done.
I would recomend you do both sides since one side is loose the other one is likely going to also,since I did my repair the ailerons have been rock solid.