Summary

I downloaded and printed the great Filament Spool Rack - Stackable - Glueless by ihateu3 https://www.thingiverse.com/thing:5865345. Since it's going to be in my office/studio, I decided to go al little crazy. I printed each of the 4 parts (per side) in a different color. No issues assembling it, but the raw gray ends of the conduit were showing in my beautiful colorful rack ends. So I made some plugs, which I printed in the same 4 colors, but didn't match them up (of course). They also keep the conduit from creeping through the holes. I guessed at how big the lip should be. Of course, if you are more flamboyant, make it as big as you want.

This is my first "upload", so sorry for any errors in protocol.