Continued testing:
… and also went to thingiverse for some other test files and to pick up some ideas…
(for my collegues, an ajax logo and an “arch-mit-ohren”[german prank])
After that i modelled the logo of our office, but it failed because it ran out of filament (and i forgot to activate the filament sensor to pauze when running out of filament 
)
Regardless of the failed print, i am happily surprised about the quality of them “straight out of the box” prints!