Thank you for reminding me of this.
One such link of which you speak (if not the link) is here.
My J-man on QCW was set to X 15.99 (not sure if 1.0.9 changed this from 16) and Y 10.00.
By using the procedure (h/t CyberReefGuru), I found my J-man on QCW was actually X 15.985 and Y 10.011. I hope that helps someone else (though I have no idea what the thread per mm tolerance is).