There are many reels like this out there for Paterson tanks. I prefer steel tanks, so this is my version.
Print 2 each of Plug, Top, outerTube, and Teeth, and 1 centerTube.
The parts should press fit together. Depending on your printer's calibration, you may need to scale a few of the parts by about 1% in your slicer.
Also included is a hook to hang the reel on a peg board with 1" spacing.
The author marked this model as their own original creation.