Thank you for your effort. The print look very good. Yesterday i tried to print it again with significant higher powder surface temperature (174). And yes the print was ok, too. In the past the print stops after about 2 cm print hight. Than you have at the right side two pilars (slice-view). And the front right pilar starts warping. The main confusion was that i had warping problems after about 2 cm. I do not expect warping after about 1 hour fine printing. In past had had parping problems at beginning and not one or two hours later.
With surface temperatur of 174 it is not so easy to clean the object like with 172.
Makes it sence to reduce surface temperatur and to lower laser speed?