I must have gotten lucky when I redid my driver's side window two weeks ago, because after having taken literally everything apart to re-glue the jaws and replace other worn parts like the sliders, adjusting the window went pretty fast, only took maybe 15 minutes to do the fine tuning. This coming weekend it's onto the passenger side and hope I will be as lucky. The mechanism has so many adjustment possibilities it is indeed more like an art than a science.