Thanks MWU.
I'll look into the aluminum brackets when I can buy the t-slot rails and all the rods for the XL upgrade. For now the brackets in PLA at 30-40% infill should be sturdy enough.
Discovered the M119 gcode function. It was showing showing X and Z as switched. Swapped the wires and resolved the issue.
First test print is showing a Y axis shift was it's printing though. Hoping that's covered somewhere on the forums.