Place the assembled fuselage and wing on a table, to establish the
horizontal position of the wing.
Place two identical blocks on the table to help with positioning the
horizontal tail parallel to the table surface. Use initially a small drop
of medium CA to attach the tail mount to the boom. Sight down the
tail and check wing and tail alignment. If not square, break off the
tail mount and start over.
If the tail was square to the wing, detach the horizontal tail from the
mount; then apply medium CA around the entire tail mount and
press it down until the CA kicks off. Doing this with the tail attached
may lead to CA wicking into the screw holes and gluing the plastic
screws and the tail itself permanently to the tail mount.
For attaching the vertical tail, use either a very slow CA or 5-min
epoxy. You need a few seconds for positioning the vertical tail on
the boom square to the horizontal tail and the wing. A fast CA will
not work well in this case. If the fit between the tail boom end and
the socket is too loose, you can wrap a few wraps of cotton thread
onto the tail boom end. This will help with positioning the vertical
tail on the boom, while allowing for the glue to penetrate into the
joint.
