Printbed fixture for heatbed of Zeepro Zim

To reduce vibrations of the heatbed from print head movements I designed an attachment for the heatbed of the 3D printer Zim from Zeepro. So there can not be any movements in X axxis anymore.
Its designed to work together with standard 22mm ball bearings and M5 screws.
The pulley is supposed to be glued together. Its easier to print it in two parts.
I used an aluminium rod 30x3mm and attached it inside the printer frame.

The green print shows before with big and log waves.
After using the