After some re-adjustment, here's what I've got:

Flexwatt taped with aluminum tape to the bottom of the tub. On the flexwatt, the probe is taped with aluminum tape.



I've got my enclosure elevated slightly off of the surface using the little felt furniture elevator thingies.


A shot of the thing from above for good measure. I've got a crock for a water dish and two temporary hides made out of cool whip containers (waiting to get hides from NERD when I pick my boy up, so I'm sure they're the right size). I'm using indented KRAFT paper as substrate.


So far, temps are holding steady at 91 on the warm side, 81 one the cool side.



Thanks for replying, all.