Static coupling z-axis / tight fit / anti z-wobble

I created a static coupling for the z-axis. It uses a tight fit to connect it to a nema 17 stepper motor. So you dont need any screw to connect it to your stepper. There is no backlash and my Z-Wobble dissappeared after using this coupling.
On the other side is a 8mm hole for connection to a threaded rod. You can use the coupling for your Prusa i3 or any other 3d-printer. I use it on my custom 3d printer aka Megatron.

I includes the ".step" files and the solidwokrs parts into the download.