Filament dry box for 3-4 spools of filament

My dry box for 3 - 4 spools of filament. There are many dry box plans out there. This one is mine. The rod is at a good height for most spools when using a pair of spool hubs on each spool 1 Sterlite 20qt air tight box. 24 3mmx10mm machine screws (3mm x 8mm will work but I like a little bit of thread sticking out of my nylocks) 24 3mm nylock nuts 24 3mm washers 1ft 3mm OD x 2mm ID PTFE tube. 1 12in 5/16 threaded rod I used 3mm OD x 2mm ID PTFE tube because its what I had on hand. The nut reliefs are too shallow (1mm) on all parts, but they worked for me. The round base of the rod holder and the U shaped 'extrusion' are perpendicular to each other. The Sterlite box has an angle of like 3 degrees or so on all sides. It's not a big deal. Loaded several versions of the U shaped rod holder. m3 with reliefs (m4 hole w/ m3 nut relief. This one also has an itty bitty section to center the rod. It makes it special.) m3 with reliefs dry-ish edition (Same as ab