On my 07 GW, I have a Kury, Vertical Hitch. My trailer has 12 inch wheels and I need to raise the ball about 2 inches or lower the trailer 2 inches in order to get the trailer to be level when pulling. Has anyone run across this problem and how did you solve it? Would prefer finding a way to raise the ball rather than investing hundreds of dollars in new tires. Remember its a vertical receiver hitch not a horizontal type. Thats the problem....