I believe he means the stab and vertical fin.

What I do is to start with the stab (Have the wing in place). Use 30-minute Epoxy. Put the stab on (without the epoxy) and check it visually with the wing to make sure it will line up. Sand the stab saddle if you need to.

Once it will line up with the wing, epoxy it in place, recheck the allignment (From top and rear) and once you're sure it's right, add a drop of medium CA in a few strategic places and hit them with accellerator to hold the stab in place while the epoxy cures.

After the epoxy is firmly set, use the same technique on the fin.