FlyingPilgrim - You hit on my concern as well. Just not enough wood without placing a hard point behind where you want to mount the Hinge Point. Like you, I don't want to cut into the covering if I can avoid. Basinbum has made a suggestion on a different thread that I am trying to get more info on. Check this out. Maybe onto a solution.

http://www.rcuniverse.com/forum/Grea...1315484/tm.htm

ual767 - what did you do about this concern when you mounted the hinge points in your Pitts? from what I can tell if you just drill through the wood there just isn't enough wood there to bite into to make me confident this will hold. Likewise, won't the glue just be pushed out the back end of the hole? Take a look at this thread above and let me know what you think. Gorilla Glue that expands thus creating a plug effect.

I am pretty well sold on the hinge points for the elevator and ailerons. I used the Kletts Flexpoint hinges in the rudder. Used six of them and didn't go through the wood. Used think Zap CA. Not sure this is the right hinge for the elevator and ailerons though.