helix probe question..

[casperca]

I tape mine directly to the Flexwatt. That way you don't have to fiddle with it in the tub. You may have to bump the temps on the Helix in order to get the desired temps in the tub, but at least you don't have to worry about it moving around.

Ditto.
I have the probe thermometer in the tub to monitor the temps inside.