Hah! You are absolutely correct, Snoonyb! That's the way my feeble mind works, sometimes. Always trying to understand every aspect of a challenge, even when a practical solution is right in front of my nose(literally, in this case, in the form of the contributors to this board
). I'm going the low stress route and pulling two runs of 12/2 taped as kactuskid recommended. I'll worry about the inner workings of jet tub control boxes in another life.
Sometimes I just need to get a "round tuit"
Thanks again for your help, folks.