I'm using mesh bed leveling and I was printing a thin walled test cube, 100mm a side. It printed with 2 vertical lines in one wall caused by some brief but audible pauses in X/Y movement. I read the G-code and the 2 pauses occurs within a move caused by a single G-Code line. Its a transit from x=50 to x=150. The line has E-steps. So none of the explanations I have seen on the Duet forums makes sense. The best explanation I have is the Jerk setting for Z being too low as described in: https://duet3d.dozuki.com/Wiki/Using_mesh_bed_compensation#Section_Troubleshooting So: what a safe max z-jerk for the motion system? I'm shooting to run my perimeters at 100mm/second (F6000). Infill at 200mm/sec (F12000).