Hmmm interesting idea
http://www.etrailer.com/Balls/Weigh-Safe/WSUN-1.html?feed=npn&gclid=CLnG8cm7jdICFUdufgodWZMKjw
Forum Discussion
I own a Sherline tongue weight scale so although at first glance this seems like a simpler solution I sure don't like the idea of having to clamp on a shell to convert the ball from 2" to 2 & 5/16". :(
