This is a simple holder for the small spools of wire you can buy on Amazon. I designed this to accommodate the 50ft spools of 22awg wire from Fermerry but I've included the original FreeCAD file that can be easily adjusted to fit any spool size.

Customization includes spool diameter, spool depth, angle of feeder, feeder hole size, etc.

Additionally, the spools just click on and off and have dovetails that nest together so you can keep several spools on one solid platform. There are also 4mm (default) screw holes for fastening to a bench or something.