@evameitner I went through the last 4 parts, and thought that it sounded somehow rather "modern" like from after 1890's (but what do I know). Maybe because the parts are also very different, especially part 4. So I went on YT to check this thought and found the whole piece. It is amazing! What a tempo, changes, loud soft what have you. Very impressive.
Looking forward to hear it dissected into smaller pieces!

It must be very difficult to play btw.