I have built an "observatory in a box" (www.angelaschule-os.de/wie-noch-eine-sternwarte/) and hence have to define a park position where the telescope is pointing at northern hoirzon (alt = 0°, az = 0°, counterweight bar leveled horizontally) in order to avoid collision with the roof. I am using a SkyWatcher EQ6-R Pro mount. I have searched through older threats in the indilib.org forum and found that I need to slew the telescope to the desired position in the sky and set this as new park position. I have tried that procedure using the telescope simulator but found that as time procedes, the park position "moves with the stars" and changes over night. 

I am probably just missing something in my workflow. I am sure there are people out there who have done just what I need and can help me.