Bearing Spool Rollers

I was unhappy with the running of heavy spools on the fully printed spool rollers. The spools never ran smoothly.
I have created a set of rollers that are able to fit proper 608-2RS bearings inside to help the spool roll as smoothly as possible.

The shaft for the bearings are one piece so you will need to stop the print half way through to add the bearings on. i found setting a simple timer for 10 mins was enough to remind me, but you could add some code to stop it.