weight distribution
Bob,
I'm not sure what you mean about "shifting more weight to the trailer"
The trailer should be as near perfect level as you can get it when it's being towed. This is to insure that the trailer weight is evenly split on both of the trailer axles/tires.
If the trailer is tilted down in front, there will be too much weight on the front trailer axle and can cause damage to the front axle assembly (wheel bearings,brakes, etc) and tires.
Plus it will make the trailer tend to "fishtail" more than normal when being pulled at highway speeds.
If the trailer is tilted backward, the same thing will occur with the rear trailer axle and tires .. except now the trailer will have a tendency to "BOB" (bounce) up and down which can cause a serious steering problem with the truck as well as cause excess wear and tear on the fifth wheel pin box and trailer frame where it is connected (welded to frame)at the trailer.
I realize that everyone has their own thoughts on this and I welcome any other views on this subject,, This is just mine,,
Best of luck in what ever you decide,,
John