Hi, Sorry if this is covered someplace else, kind of new arround. Ok, so when I'm in cruise with AP on, say at FL250 and 300 kts (my average FL flights) and ALT on, sometimes I get horrid and progressive pitch oscillations becoming from soft to really strong. Also most of the times this happens to me when I reach any given waypoint and turn to the next, then the pitch oscillation starts. By the way it happens to me in both XP9 and XP10, any help is appreciated. Thanks, Alex