Prusa I3 MK2 Z-Axis Improvements

I had noticed two things about my Prusa after many printing experiences. One was the occasional noise when the lead screw hits the top Z-Mount. Sometime when rapid reversal from up to down or vise versa so I figured making this more rigid would be a benefit by adding a 608ZZ bearing. The second was that my Z-Height was slightly skewed to the rear of the Y-Axis at the top on a full 200mm height. This meant that my Z-Travel was not truly perpendicular to my bed. I was off about 3-4mm at the t