Mark,

Great question. It took some head scratching to figure out how I wanted to go about it. The sub-fin area on the bottom of the fuselage is covered with a piece of 1/4" balsa that is added after the stab socket is glued in. I slid the socket in with the lightply doughnuts on the socket. I then set everything up in the jig. I only glued the outside were the extra socket sticks about 3/16". Once that was all cured, I turned the fuselage over and glued the inside and the doughnuts through the open area in the bottom of the fuselage.