Lack-side Spool Holder

My new Anycubic I3 Mega came with a pretty good spool holder, but the printer itself barely fits on top of my lack tables, let alone with a spool next to it. I spent a while searching for a spool holder that would fit my exact model of wire shelving (they're all different dimensions, different wire diameters, etc) before I stumbled across SteelCityElectronics' solder spool holder and decided to alter the design for my own needs.

There's a stack of bearings burning a hole in my parts drawer,