Summary

See it in action here -> https://youtu.be/U82H9aM9AcU

Bearing is standard skateboard bearing.

Can be mounted with screws or glue (Hot glue works well). Some of the parts use 2/3/4mm screws but you should be able to use glue there as well.

The magnetic base takes 2.6mm magnets and gives the mechanism a little more give and a reliable/easily fixable fail-safe point, however, it should work mostly fine with the non-magnetic versions.