Thanks for all of that great info Tom. It will be very helpful.
John, thanks for suggesting the Lever Nuts. I think that Lowes carries them. If I can buy a small packet of them, I will give them a try. One factor is, that when I joint two wires together under the table with a crimp or spade connector, I can staple the wire and connector flush to the bottom of the layout board. I think that the Lever Nuts would be hanging down though.
Mannyrock