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:
https://ball-pythons.net/gallery/files/1/8/0/2/CADD.jpg
Here's a Pic of the back of the rack showing the Flexwatt taped in:
https://ball-pythons.net/gallery/fil.../0/2/Rack1.jpg
And the slip-on connections between shelves:
https://ball-pythons.net/gallery/fil.../0/2/Rack2.jpg
Finally, the finished unit sans Sterilites:
https://ball-pythons.net/gallery/fil.../0/2/Rack3.jpg