Companion hitch adjustments

Hey guys, I bought the Companion RVK 3600 hitch and I had a couple of questions. I have a lot of towing experience, just not with a fifth wheel/goose neck. I'm pulling with a 6.5 ft bed truck in my signature. When I picked up the trailer, I set the pin distance 4" aft of the axle just to make sure I would have plenty of clearance on the way home. I know the ideal place is directly over the axle. That said, it feels pretty steady, but occasionally feels a little like a bumper pull with strong winds. I was wondering what benefits there would be if I moved it farther forward to the cab and put it directly over the axle. I know I would lose some turning capability. So.....

Where do you guys that have this hitch have the pin located at on your truck? 2" forward of the axle, over it, 2" aft, or 4" aft. Thanks.