Hi gr5,
thank you for the bulkier answer. The retraction works, but maby I can adjust it better than it is now. If ther is possibility to start the retraction earlier than it must work. The other thing what I will try now after your answer is to go a few higher with the first layer... at the moment I am with the first layer quite down.
So I do not have the problem that the part stick not really well, rather the opposite.
If I find the solution I wili post it here.
Thanks
David