Hi There, im from germany, new to the forum and what you would call a 3dp newbie i guess. I am testing a bugfix-2.0.x build (cloned yesterday) with the ubl feature on my ender3 with 4.2.7 board and blt connected to probe port. When doing a normal bilinear leveling, results are good (see screenshot from bedvisualizer: ). When doing a Mesh with 5*5 (normally i would do 7.7 at least but 5*5 is fby Silikowski - Firmware - Marlin