David
I have a 2006 Monterey Ventura IV. I had the same problem with mine. After removing the wooden trim from both sides so I could get to the mechanisms, I found that the locking nuts had backed off the adjusting nuts that align the vertical tilt. It took considerable trial and error adjustments to get the alignment correct again. Just a little movement on the adjusting nuts makes a big difference on the tilt. After finally getting them adjusted to my satisfaction, I put the locking nuts back tight with a little locktite on them so they would not come back loose. Good luck with your realignment.
Richard