I won't mention any names, but I don't think it will take long for anyone to figure out which aircraft/manufacturer I am talking about here. The dilemma, is the lack of hinge back up blocks in a sealed composite surface, (wings, rudder, ailerons, etc and what balsa that is there.... is very soft. With an 1/8 inch balsa leading edge and an 3/16 Robart hinge point embedded, you just don't have much glue surface, and no way to access to install back up blocks without cutting into the nicely detailed surfaces.

After gluing a couple of hinges into the surface ( 2 ton devcon epoxy), I did a pull test and it did not take much effort at all to break the hinge loose and remove it. This is really poor engineering on the manufacturer's part, with little that the modeler can do to correct.

(Note) First pic, I tried to get a view so that you can see the thickness of the cross section in the balsa leading edge.
Last pic is a mockup, and essentially what you would end up with...not good!!!

So, the question is...anyone know a solution to this without having to sacrifice the surface detail.