This asshat has been glorified in many forums within pool since his 6 month prison stint for peddling hard drugs. He is trash...he will screw over anybody for a dollar. Just another clown in the circus that is American pool.
I think he means vertically on faces of the slate...then glued to stop slates from popping. A lot of guys use business cards the same way.
Dam sure won't hold if you flip a table sideways!