Quote:

@Markoz: I recommend to use my tipp in my reply #1 and you have a stable 707 also in high altitudes  ;) I guess this depends more with the AP.

So your saying that if I modify the roll_stability=1.0 to roll_stability=1.5, then my 707-300 will be more stable at FL410? Fair enough. Sorry, but that's not going to happen. The 707 flies fine on the default settings for me, and I always fly at between MACH 0.78 and 0.82 anyway, and I don't have any problems with it at FL410 if I fly there. ;)