I am having the same problem with a brand new DEWE 7485. I was making some staggered slit cuts for fingers on the corner of a box. Every time I move over and make a new slit the height keeps decreasing. I read the previous thread and when I turn my saw over I do not see a similar 17 mm nut to tighten the vertical rod. There are no nuts or screws or adjustments of any kind that I can see to help increase the tension. Has anyone found a solution on the 7485 model?