Therefore I post these pics, even if I have not to be proud of what happened to this first flower.
I had the plant with the bud looking at me, = turned away from the light. So I was able to watch the development;
But when the bud exploded/opened the petals complety flipped backwards!
I of course changed the alignment of the plant towards the light, and the petals were so nice to re-adjust a bit:
Maybe the second bud will have more chances to open 'normally'
,