This is a remix of Foreverwinter's Quick Change Universal Spool Holder that has been resized specifically for Spannerhands 1kg universal spool holder. It uses the 608 bearings that Spannerhands default spool holder uses, and the bearing mounts from the Spannerhands spool holder snap into the bearings. This is very similar to the remix by MotoGP1199's Spannerhands universal spool holder, except that MotoGP1199's version requires the use of a shaft, and this does not.
I'm using this with Amazon brand 1kg pla, so the diameter of the nuts was sized specifically for that. If you need to do some tweaking, Foreverwinter provides a fully parametric fusion 360 file, so you can tweak measurements as needed.
.3 layer height is fast and sloppy, but it works. Step down to .2 if you want it pretty.