Anet A8 coupler Anti Z wobble guide

The coupler between the lead screw and the motor shaft is there to make sure everything turns smoothly even though they are not perfectly aligned.
But then you get what's called z wobble, and this can be translated into wavy prints.

So we need something rigid but still flexible enough to compensate for any miss-alignment.
This thing bolts right over on top of the old system, keeping the lead screw straight while the coupler allows the slight miss-alignment.

I have not tested this with a