It's time to expand! I'm building 2 racks, 1 with 41 qt tubs, primarily for colubrids, and 1 with 74 qt tubs, for adult female bps. I think I've got construction all figured out, but I have some flexwatt questions:

Should I go with flexwatt running up the back and/or sides, or underneath the tubs? Most of the videos/posts I've seen about it seem to suggest underneath is better, anyone like having it on the sides better?

If I go with underneath the tubs, does anyone know of a good video/tutorial about wiring each shelf together? That's the most challenging part of this to me, and I'd imagine it's part of the appeal of going with heat tape up the back/sides. Gotta do what's best for the critters though

Thermostat recommendations are welcome as well!

Thanks in advance, all input is appreciated!