I know I'm a bit of a "late-comer". I've been a fan of SF Marchetti and had just installed RealAir 172SP. However, I noticed a couple of strange problems ---i) the 172 "unpredictable" tendency to roll left AND sometimes right during take-off !!! Left-roll tendency is understandable, but right-roll tendency ??? This can happen even during level cruise and even descent. A checkride in other aircraft (eg. SF260, etc.) shows the left-turning tendency is still there and working fine.ii) after installing 172, I noticed the Heading Bug (as well as VOR pointers) are no longer pointing at North by default. Instead, for ALL other aircrafts as well, these all now point to about 300+ degrees. Or were they all the while like that in FS2004?Any advice much appreciated.LEP

i) "roll" as in "yaw"? weathervaning?ii) is this something that gets set based on the default flight setting?

It's roll and yaw combined effect. All settings as per recommendation --- full realism, with 50% P-Factor (also tried 100% P-Factor, still same result).