Implemented the independent Z motors on my big box and 2 things are imediatly clear. 1) Z movements are dramatically quieter! 2) Leveling left and right is now a snap. I was always shifting the left side a bit after cleaning down the bed. Now, all sorted. Run G32 a couple of times and sorted. Seriously happy with the new bed leveling using 2 Z motors! As I have a redundant cooling fan on the flap to the electronics I reallt should hook it up and have it turn on based on CPU temp/Driver warnings and who would not want to be able to resume after power fail! Need to look into that a bit more too.