On both Dollos I did some Z-axis refactoring by moving the Z-screw to the middle of the Z-rods. I saw some parts tilting slightly caused by the Z-rod being some 30mm invards and the friction of the printed Z-slides and rods. The change in print quality wasn't very noticeable asfter all, I've noticed that using Z-hop seems to kind of hide some inconsistencies in Z-movement, it kind of resets the Z-position.
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I'll be adding a support leg beside the Z-motor, I suspect that the beam holding the motor bends enough to cause some small errors in Z. Not sure if it really matters, but I want to see if there's any difference.

The fully printed Dollo.2 Z parts are holding together supprisingly well, I've done at least 500h of printing on the Dollo.2 and the parts are still in good working order. I checked them during the Z-screw position change when replacing some parts and there's no noticeable slack yet. Happy to see it's working and there's no need to do maintenance on it all the time.