Installed the elevator servos today (Blue-Bird BLS-3507), opened the slots for servo horns.
Then proceeded to glue elevator horns, using HYSOL with black carbon dust. Sanded horns to roughen the glue joint area before gluing (very important!)
also glued rudder hinges with Hysol, and glued vertical aluminum tube into to the fin.
While stock ball links looked fine, i opted for my favorite kind - Dubro 4-40 ball links.
pics attached.