After your other message, I went to the robart site and ptinted their hinge how-to's. If you have not seen this give it a look. It made a lot of sense. Did you make the little grooves with a file or exacto for the actual hinge point? I think the recommend it be done on the surface that moves.
Yes, the Robart website is excellent for lots of useful information.
The edges of the aileron are so thin that a very sharp knife is about the best way to make the grooves. It's a good idea to very carefully 'paint' the bare wood with very thinned out epoxy, before fitting the hinges (thinned with denatured alcohol, and making sure you don't fill the groove again!) and leave it for at least a day to set hard.
I will take some pics this evening and post them soon.
-DC