The Z-Axis on my Genesis XL is very noisy. I have realigned the lead screw and the stepper motor but it hasn’t helped.
I then realised that the cross-slide plate vibrates a lot. Inserting some 3D printed silent blocks around the leadscrew block has helped to reduce these virbrations a little bit. The Z Axis is still noisy but less so than before.
Designing these silent blocks is trivial but I saved a copy of the STL on Thingiverse to save time (https://www.thingiverse.com/thing:4485690).
Filament: TPU (Ninjaflex in this instance), printed at 100% infill.