On Sun, 8 Nov 2009 09:51:12 -0800, "Jim Hall"
wrote:

That makes design easy then..! I'm going to try and make some round wooden
bench dogs with a ball catch mounted on the side to keep it from falling
through the bench dog hole... Catches like these, I think..

http://www.woodcraft.com/Family/2005...on#information

Sounds like work that may not be necessary. There are dogs that have
their own friction spring clip so they don't slip through and there
are dogs with the surface part wider so they don't slip through.
Here's a few examples.

http://www.leevalley.com/wood/page.a...=1,41637,41645
http://www.leevalley.com/wood/page.a...=1,43838,43847
http://www.leevalley.com/wood/page.a...=1,41637,41645