3D Printer Filament Rack

This is the gist of the filament rack I built. Not too expensive, not horribly complicated. Easy access to all spools. Framework for potentially added a full enclosure to protect against dust and humidity. And most importantly --- cheap! It has 24 posts, each with the capacity to hold two 5 lb spools (by length that is. It seems like it should be strong enough but no guarantees haha). I used to just slide a bunch of spools onto some pipe or threaded rod or whatever, but changing them out was