A Useful DryBox

So looking around on the various sites, I gathered dry box ideas and parts from all over and with a need for keeping my filament not only dry but clean and in an overhead bin.
I have 41 printers and almost all are fed with overhead dry boxes. This keeps commonly used filaments in reach of all my printers and I can change out filament on a printer with ease.
To start this box, I used Sterilite boxes found at hardware or department stores that have at least 4 or commonly 6 lid latches and a sealing lid that has a rubber seal around the lip. This makes the box dry from all moisture. See below for links.
Next, Spool holders that use 608 roller bearings are used to keep the spools rolling inside. Determine your need and print 2 spool holders for each spool. The enclosed spool holder was customized by me from a listing that I cannot locate now. I added a higher side to keep the spools from jumping out of the track.
To hold the spool holders, I use a 5/16th diameter threaded rod availa