Hi there, when starting to commissioning a ready built dual machine you start in the Wiki at Printer Commissioning and then get setup your Z axis and Leadscrews. At the very end of that chapter you have to adjust the height of the left and right side of the build plate by rotating the leadscrews manually and measure the height of the build plate with a ruler. That's is fine so far for a normal Pro or Lite machine but for a dual you later get to the chapter where you have to calibrate your Z offset here. Ok, a dual has no Z offset because it does not use auto levelling. But in that chapter you are advised to rotate the leadscrews again manually to get the build plate up to the nozzles for adjusting the IR sensor. This is IMHO a problem because by manually rotating the leadscrews you may turn them not equally and so the adjusting of the previous chapter I described above is obsolete. I'd propose to add a note in the first chapter for the leadscrews that this only applies to Lite/Pro machines at that stage and that Dual machine have to do this AFTER the Z offset chapter is done. What do you think?