end stop screws backwards. Stuck on paper width across plate

[GPriv]

X tower is on the left...so X direction is toward the right of that, yes?
Y tower is on the right so the Y direction is to the left of that, yes?

Any number, say X50 is 50 mm from exact center toward the right, yes?


I'm trying to calibrate for the center (#4) now. The distance from the nozzle to the glass is eight sheets of paper.