not having a consistent 0,0 makes me really uncomfortable…
optical alignment of the head can change over time due to changes in camera positioning from things like hinges not closing the way they used to, plastics deforming, etc.
If I make a part that breaks down the road, and I need to remake it to less than mm accuracy, not having the ability to physically line something up will make that so much more difficult.
In a machine that is supposed to be designed for laser point accuracy why would anyone choose to remove that from the equation?!