consistent Z marks

I was running some ghosting prints which turned out OK other than the Consistant Z marks. This is the second print in a row with the same marks, when I shine the light you can see each ridge is creating a shadow! I'm not sure if this is more a setting issue or actual z rod problems. Any help appreciated! Vz-hextrudort with PA @0.04 Input shaper is on with MZV active RR400 3.1