The attachment on the front of your Sulky is for times you are pulling a dump cart, or when there is no attachment on the front of the Gravely. Otherwise, you want to remove that attachment, and put the 'clamshell' piece on the front of the Sulky (you may not have this part) But in your case, you'll also have to get another ball, as you altered it and it won't work now with the other ball, the clamshell. SO, with the Clamshell part attached, the Sulky and Tractor can FLEX a lot up or down at the ball. That setup is best for mowing as it allows the mowing deck to ride up and down over your low and high spots and you can also using your feet on the foot holds and hands on the handle bars and pressing down, easily lift the front of the deck off the ground in order to get out of a difficult spot or over some object. Also, there was no need to shave down the ball. The attachment on the front of the Sulky was upside down. It's designed to have a small hole on one side, and a larger hole at the bottom. Most of these Gravely hitches it's best to leave the ball on the hitch sulky when removed from the tractor and NOT ON the tractor.
