I don't glue anything on the stands. The ball needs some careful filing if you want the ship to be posable. Without filing it moves with great difficulty if at all and could break either the socket or the stem; too much filing and it moves too easily, leaving the ship at a permanent TOS-style "dead in space" angle. But if you get it right, the ship can be angled easily and will then stay there. (If you overdo it, use the ball and socket for a small ship like a frigate, then try again to make the ball and socket for a cruiser. The lighter ship will be less likely to tip over due to an over-filed ball.)
If the stem is not glued into the ball then it can be removed, making the model and stand a lot easier to transport. I don't even bother gluing the stem to the base, so that the whole stand can be dismantled and lie flat in the transport case.