Taz 6 coupler won't align

Hello,
I have had problems with Z wobble/banding on my Taz 6 prints, here are the steps I made to try and solve my problem:

1.Replaced couplers with solid couplers and other flexible couplers none helped.
2.I removed some/all of the top and bottom bearings on the lead screw (very small improvement).
3.Purchased 2 new lead screws assuming that one of my lead screws was bent (no improvement).

This is where I saw that when tightening down the z motor to the motor mount the coupler gets misaligned and shows bigger and smaller gaps.
The other side is perfectly fine and I am following the exact same steps with the z motor jig and everything.

How do I align the coupler with the lead screw ?

Thank you so much.