Hi, Background: I'm building a new printer from a cartesian robot that work were disposing of (obsolete tech for them) and to make things easier I've swapped the original Y and Z steppers to make the mechanics easier. I'm also using a Makerbase MKS Gen 2.1 motherboard (I have some stepper drivers from another project that I can use for now) and there's a set of steppers and optical end stops thaby rototype - CoreXY Machines