B&B Specialties makes a 1/4 scale CA hinge. Seems very nice! Probably similar to radio souths. I have a DP extra and modified all surfaces for Robart points, except for the elevators. Unfortunately the elevators do not have enough space to properly install a robart point, as the mount tube gets in the way. That is why I kept with the CA hinges for elevators. While I have not yet flown this plane, Im hoping this set up is oK! I have a Zenoah G-45 mounted to the nose, and the plane is pretty awesome looking! Cant wait to fly it! Oh yeah, I sealed all the gaps.