I used Greg191134's filament roller as a base for the actual ball bearing spool-clamp design.
Uses 625zz bearings.

Remix of CR-10 Top Mounted Spool Holder by STSmith94

• Thingiverse remix function seems broken :(

Creality

CR-10

No

Yes

.2

25%

lithium grease helps get it all screwed in. I had to use rocking motion on threads to get it just right.
Draw or scratch reference lines down the tube to help align the bearing holder-parts so they sit square on top of the spool holder