Hey Ryan,
I see not why you would not store the machine vertically. Of course you should set the park position to positions where gravity would let the carriages slide to anyway, or use Jim’s “low-tech” Method.
Operating vertically is another thing. As vertical operation on the Standard Series has shown, you need to adjust the stepper motor currents on MOTORS pages to reflect the forces exerted by gravity during the axes movements. And you can not do stall homing against gravity, only with it. I don’t know the reason why the Elite Series is not allowed for vertical operation while the Standard Series is. @OnefinityCNC probably knows. Possibly it’s because of the weaker X stepper (Standard Series X-50 stepper motor (1.85 Nm), Standard Series Y stepper motors vs. Elite Series closed-loop stepper motors (1.2 Nm))