Hey
after using the Vertex K8400 z-axis stabilizer My prints started to have a steady Z wooble ( every couple of mm ). After carefully watching the rod I noticed that the rod wasn’t well aligned with the bed bearing.
So I came up with these small parts to increase the position of the stepper motor without having to desmantle the whole axle. Simply loosen the bolts and slide these in. I even added a small wall so it’s easier to remove. They are in catpart for easy editing.
Your opinions are most welcome. Sorry for the fast post but wife’s screaming!! 
And yes it only helps in one way…better one way than none.