email from Garmin:
The Robertson STOL kit droops the leading and trailing edge devices which could change the behavior of the AP considerably. Garmin has no approved data for this installation with a Robertson STOL Kit. The Robertson also changes the original roll bellcrank which makes our...
Is there a viable new generation autopilot for a 1975 A185F with Roberston Stol? I know just fly the airplane but mine is a family IFR hauler and I need to be able to study an approach plate in the clouds or turn around and yell at my kids.
Trutrak and GFC 500 both say not compatible with RSTOL...