@kapakai Ideally yes, but not 100% necessary, remember that the stepper motor is designed to move in full steps, and one full step will be 0.04 mm of rise, so those heights are sort of set in stone. but the RAMPS board implements something called microsteps, where they divide the electrical signal to the stepper into 16 different amounts. It is too hard with cheap hardware to make sure they are equal steps or precise steps and there is no feedback loop built into stepper motors to see if they are precisely in the correct spot. The microsteps give you finer grain control of the head position within the manufacturing limits of the parts provided. So essentially you can set pretty much any height you want, just be aware that there is no guarantee that 2 full steps + 8 mircosteps is really equal to 0.1 mm of movement, for all practical purposes it is. I tend to try to use full steps as those are reproducible and will allow the stepper to run cooler. But I am also using TR8*2 lead screws now which provides 0.01 mm rise per step.