After adjusting the height I found the BIG DIFFERENCE in playing my piano at home at once:
Thanks to the new body position and balance the pain problems of my spine column, shoulders and neck have been eliminated because in this position I have no more weight on the weak zone of my bones.
More than that I have the strong impression that my dynamical play is much easier and virtuoso technical passages are going even easier to the pleasure of my audience and myself!
As soon as possible I am going to show it to my friend a piano professor and he is planning to make a collective order over the Piano-bench-page of DoctorsHobbies.com for most of his students.