RE: GP Super Stearman
I used Robart pin hinges on mine. The only thing with this model is that the control surfaces have lite ply through the center of them. Keeps them real stiff, but the lite ply is tough to drill into straight because of the lite ply. It was worth the extra effort, though.
I did three videos telling how to install the Robart Pin Hinges, but I didn't do anything on the hinge pockets. I used the Stearman wing as my building example.
~ Jim ~[8D]