Well, I got tired of setting up temporary Sterilite containers during quarantine, so I went ahead and built a new rack. I used one full sheet of melamine to get 5 medium slots that can also fit 10 shoebox Sterilites. I installed 3" Flexwatt in series by soldering two pair wires on each strip and connecting them using slip-on connections between shelves. This will let me shut down individual shelves depending on the number of snakes I have to quarantine.

I started off by using my CADD, drafting and engineering skills to draw out the plans:


Here's a Pic of the back of the rack showing the Flexwatt taped in:


And the slip-on connections between shelves:


Finally, the finished unit sans Sterilites: