CR-10S PRO z height leveling block - direct x to y rails leveling for max precision

There are already a lot of z height blocks around but I was looking for maximum precision while haven also a maximum ease of use.
I found some designs leveling x to y rails which would give maximum precision, so I went for this concept. To get the ease of use I designed a one piece block which will stay stable while moving the z axis down since you will need two hands for operate the two spindles at the same time.
The process is just straight forward:
1. Disable stepper motors
2. Move the be