On Mon, 19 Jun 2006 18:42:16 +0100, Harry Bloomfield wrote:

What is needed is one of those joints where it
locks with teeth giving a choice of several fixed angles. That would
need much less pressure on the joint bolt to make it stay where put.

AOL

I a ball joint won't work, but joint capable of movement in one plane only
with mating faces equipped with teeth should work fine.