Spool Holder for Stackable Freestanding Filament Rack

After building the Stackable Freestanding Filament Rack (https://www.thingiverse.com/thing:2948330) using 3/4" EMT galvanized conduit and sitting it next to my printer, I extended the top bars to extend above my printer and designed a spool holder using 608 bearings. This allows me to move the weight of the spool off the top of the frame of my printer and gives me ample locations for mounting multiple spool holders above the printer.

You'll need to print 4 each of the ConduitSpoolRoller per