Ball bearing spool holder nut remix

thingiverse

I assembled the parent spool holder, but when i went to attach it to the Ender 3 spool arm, it was quite difficult to hold the round end while tightening on the nut. To fix this, I just remixed the end to be square and fit in the ender arm snugly, so it won't spin while tightening on the nut. you'll still need almost everything from https://www.thingiverse.com/thing:4208201 but you can substitute this part for "mounting barrel".