There are no adjustments.  I had the same problem and what I did was, I raised the roof and locked it. I then placed a small hyd. jack under the frame at the top rear. I then removed the set screw and jacked up the top about 1/4 of an inch and then drilled a hole and replaced the screw. This worked for me. I would not go any futher than a 1/4 at a time as you may get the top all out of wack. But if so you can always go back to the factory hole. Does that make any sense?
                                                                       Gary