[Richard]

Chester,

Here you go.   http://newellgurus.com/showthread.php?ti...hlight=SCS

This schematic is courtesy of Mark Fincke. He did a pro job of drawing it out      

I used these relays.  https://www.mcmaster.com/#definite-purpo...s/=14w52m6  25 amp contacts, and make sure you get 120V control voltage. You can probably find them cheaper.

Bill may still have the bill of materials he used when he built his setup.