>Also, I like the idea someone on the list had about using a cutter to
>score lines in the ball-socket surface(s), giving you a surface with
>friction.

Or just rough up the two surfaces (ball and socket) with course-grit
sandpaper or emery paper (why is one term one word, and the other
term two words?).

Dave
--
Dave Carpenter

Whatever you wish for me,
May you have twice as much.

"Sometimes I think we're alone in the universe, and sometimes I think
we're not. In either case the idea is quite staggering." -- Arthur C.
Clarke