Monokote hinges
If the model is to be covered with Monokote or UltraCote, then consider making film hinges. I have used these hinges on CL and RC planes with great success. Some are now over 30 years old with the original hinges still working fine. These hinges are as nearly frictionless as you can get. Cut a 1" strip of film and cover the leading edge of the elevator and the trailing edge of the stabilizer. Now cut a 2" strip of film and cut it in half to make two equal length 2" wide strips. Lay one strip down adhesive side up. Flip the other strip adhesive side down and lay it along side of the first strip and overlay 1/4" of adhesive. Use a sealing iron at 220 degrees F to seal the 1/4" glue area. Now cut off 1/2" wide strips to produce hinge straps with half the adhesive facing up and half down. Iron on these hinge strips with the same spacing as you would have used with old cloth crisscross hinges. Once the hinges are in place, then cover the surface with film as usual, which also seals in the hinge straps. These hinges will be incredibly strong, very durable, extremely light, super smooth, nearly gapless, almost invisible, highly flexible, require no holes or slots, are inexpensive, extremely cheap and and don't cost much either. I know you won't believe how strong these hinges are, so try hinging a couple of scrap pieces of balsa together and then try to pull them apart. Then you will know just how tough these can be.