Hello, I upgraded trucks a while back, my previous truck had a B & W square sided turnover ball, my new truck has the GM factory system with the round shank. I use the truck for multiple different trailers and have a B & W ball that fits the factory connection. I noticed that the ball has slop in its bore in the truck. Apparently this is a known issue and was planned, the slop keeps the ball from seizing in the hitch. I've pulled gooseneck trailers for close to 30 yrs and this is the first loose fitting hitch I have ever seen. I picked up a goosebox a while back and was going to put it on my fifth wheel, but slop in the ball gives me pause. I was wanting to reach out and see what type results others with this same system are experiencing. I suppose that with enough weight on the hitch and the air ride of the goosebox that the feeling of it could be negated. Only thing I have had on that ball so far is a lightly loaded cattle trailer. Definitely felt the slop at low speed and unloaded. I have access to a B & W Companion that fits my puck system, I moved the fifth wheel with it the other day and it was tight as a jug.