Great project! However, I'm very confused by the PCB foot location. Using the dimensioning sketch provided in the description setting the PCBposX and PCBposY both to zero should put the first pcb mounting on the axes correct? However, if I do this either in the customizer or in OpenSCAD the mounting hole is significantly offset from this position. If use my calculated origin the drawn PCB sticks way out of the back of the box. Can anyone offer guidance?