This arrived in my mind as a complete movement, with nearly all details in place. There was (and is) a problem creating a score which is neat, legible, and accurate. I have a complete score, but it needs at leas 10 more hours of work. Meanwhile, here it is, mp3, using GPO Steinway. Length, 5:43.
Rosentulpenelken, 1st Mvt
It is the first movement, but the last to be completed.