After several trips to the dealer because of miscommunications and weirdness, we finally picked up the trailer. The bottom of the coupler is 17" and the inside top of the ball cup is 18.5". The Husky instructions asked for the inside of the ball cup and recommended setting the height of the top of the ball at 1" higher than that. With the additional 2" drop from the new shank (total 5" drop), that put me at 19.25", so pretty close. After setting the anchor points and hooking the chains, we were good and level. With the WD hitch and antisway, it was smooth on the highway, even though it was a bit windy and passed/ got passed by a few big rigs.