Thank you for the hint.
I received my pack 10 days ago and it is rev 4. I see now that I have received a wooden part of rev.3
I seem to have the choice to build that particular part according to rev.3 but the white tube holder clip seems to not fity (i guess the equivalent in rev.3 is different, most likely longer). Again I can widen the round hole in part 8A to make it fit - is that the way to go?
Should I claim the correct part from Ultimaker?
What for is the butterfly shaped black clip from rev.4?
Thank you for your advice!
Olivier