Leveling 5th wheel question

I have followed this issue a lot on another forum and here is what I have heard. Raising the ball on the anderson hitch "will not" solve your problem about hitting the side rails on your truck because it is the hitch inside the box hitting the rails not the trailer. So there are 2 ways to mount the block on your 5th wheel kingpin. When you mount it with the kingpin behind the ball on the you have more clearance from the cab but if you try to make any turn aroung 40 degrees or more you will hit the rails. So what folks are doing is mounting the bracket on the kingpin so that the kingpin is in front of the ball. Basically moving the trailer closer to the cab. By doing this it will give you approx 85 degrees of turning radius. There is a lot of discussion on this subject on the GrandDesign forum. I also have the anderson ultimate hitch in my short box truck I run it with the ball set on the middle hole and have the kingpin so that it is in front of the ball on the hitch.