Slightly universal quick release Spool Holder for I3 A8 copy machines

By "slightly universel" i mean you can set it on top of any printer with a 8mm wall.
I've used BoomZilla1's "Better 3D Printable Bearing", witch i found easy to print and works well.
And i've modded them a bit so they have a little reverse circle (I don't know what you call it) in them, so the spool stays in place.
These bearings makes the spool roll easily.

I've used this threaded rod that came with my printer to hold the 2 parts together, if you dont have that, then you just have to g