Hi I have the same problem as Kollekolle94. It seems that holes aren't that precise than the rest of the part. I attach a better Photo. The thread is not usable. I printed a Screw which looks fine so I think that there is a problems with holes. I printed these with pla, 205 and 55 degree at 0.2mm. I will check the combing mode.
edit: combining-mode is off.
Any more hints? Thanks