2020 spool holder

I replaced the motherboard on my Cetus with a MellowFly board and I can't quite get the same print quality as I had before so I am slowly but surely replacing everything to find the issue.I used two skateboard bearings on an 8mm carbon fibre tube To make this one as smooth as possible . It just slips on the 2020 extrusion that is mounted to the printer itself via the bracket and m6 nut as my extrusion is threaded and m5 for screw and m5 slot nut.