RE: Hinge problem
I use Dubro pinned hinges for my 2m and smaller planes. They are light, strong and allow absolutely free movement of the control surfaces.
I heard good stories on CA hinges but never tried myself. Seems the correct installation is hard to achieve.
For 50cc or larger planes, Robart hinges are the way to go. The stems should be sanded lightly though to allow good grip by the glue.