I had a crash and had to fix an aileron's CA hinges. I ended up using Robart hinge points. I was going to do what everyone else here has suggested.... but like capthis said.... "you could run out of fresh wood to use". My situation was this. The aileron I had to cut new slots in, was the aileron that was SOOOOOO dense and hard when I built the plane, I liked to never got the slots cut. Add to that...... what you could run into ... when applied, CA will travel through the wood grain. The balsa....right next to the old hinge, MIGHT be VERY hard from CA "moving". Here is the hinge page on Robarts site.
http://www.robart.com/New%20Pages/Hinge.html
I used the 1/8" size on a 40 size plane. They were a little too big.... but that is what I had.
I think the 3/32nds size might work better for a 40 size plane. Epoxy can be used but other glues can be easier to use and clean with water. You might want to do a search. I have seen a lot of discussion on different glues for these hinges....lownslo......

Bob