I've been trying to get started on Cura after switching from Simplify3D, and I have been running into the same problem of the print starting about 8mm from the bed. I have the Anycubic Kossel Plus with the auto leveling bed, but it seems that adjusting the Z offset from there does nothing. I am running Cura 3.6 and I can't seem to find any way of fixing this problem. I've tried adjusting the max build area and dropping the model through the bed in the preview, but nothing seems to work. If anyone has any ideas on how to fix this, it would be very helpful. I have attached the gcode if anyone knows how to decipher it to help me out!