370mm X 250mm X 300mm

[AutoWiz]

So to keep from draping a wire across the entire length of the x axis I decided to just mount the x endstop in the max position on the wire harness side of the frame. I did this back when I built the printer and have struggled with mirrored prints the whole printers life. I would just mirror the item before slicing it for this printer as a temporary fix. It took a little bit of trial and error to get the settings right as information on homing to max endstops seems to be rare. But I did finally get it right and on my own. here is a video of my black widow homing with only a max endstop on the x axis:

https://www.youtube.com/watch?v=veQp-ANKWKE