The easiest way to get away from the glue is to drill a small hole in the PVC that is going to slide over the other, push the pipe them together and screw a set screw (small regular self-starting metal screw) into the hole just far enough to put sufficient pressure between the two to keep them from coming apart. I use this method all the time and it works great.
JCO
Irish eyes are always smiling but
"In the eyes of the world, you are only as good as your last success"