yep you would be pretty much correct, the ball suitable for Hyland has a taller/thicker base flange this is particularly important if you are using a WDH
Well what can I say about my balls:redface: I just knew when I was typing it some one would see the dirty side of it.
So I guess I should describe my balls, I read a lot of reviews prior to purchasing my hitch & they all said to go with a slightly longer shaft, the theory is the longer shaft keeps the neck of the hitch off the tongue..... BUT I have found the opposite.
My ball with the shorter shaft has as yet never got stuck, where as the ball with the longer shaft often gets stuck.
I have never used a WDH as I have air bags, but I cant see why the length of the shaft would make any difference to WDH's performance.