Spool Storage Rack

My latest skirmish in the never-ending battle with filament spool encroachment. These racks provide excellent storage density, pretty much doubling what you can get vs a shelf of the same depth, and they look kinda cool, too.

The shelving was bought at Lowe's, it's their "Style Selection" brand of heavy-duty double-row rails and brackets. The brackets are formed with a hollow slot facing upwards, into which the tangs on the bottom of the printed parts fit. The pipe is standard 1/2-inch black