gday everyone.
have a quick question/problem regarding my 11" cpc celestron.
im finding that the when i use auto align that the alignment gradually is lost over a period of say 1hour

(it is lost by a full 17mm 2" view)
ive checked the tripod level and that seems fine but cant think of anything else it could be?? (maybe my alignment bubble is buggered??
i usually align with my 32mm but was thinking maybe the results would be better with my 11mm televue but i used 1 star align on saturday night on sirius and it still wasnt accurate.
i have updated to the latest software for the hand controller and the gps seems to be working properly
any thoughts or suggestions would be very appreciated