x/y axis belt 608 bearing adaptor for 3drag/k8200

In an attempt to improve the overall performance of the 3drag, and with a handful of 608ZZ bearings at hand, I wanted to create an x/y axis bearing adapter. Original is with 5mm, so i increased it to the 8mm of the 608 bearings. It has a small inlay so the inner circle of bearing is having full contact. I added a small hub so belt wont get lost.

The first file was 4mm, but in real it is 5mm. I added it with adjusted hole.

There will be an update soon with added 4mm nut support for one sid