With regard to the tipping issue, and I am no expert at autos yet, I see 2 possible causes.
1, precession again, any pitching moment (caused by the airstream not meeting the rotor head- on) will be turned into rolling moment by the rotor.
2. The Center of Lift (CL) is so high, and therefore so far from the wheels, that the wheel drag can create a large rolling moment as well.

I guess they are not really separate issues, but additive effects.

On some RC planes, the gear are deliberately toed out several degrees to reduce the rolling moment in crosswind conditions. all the pics I've seen of Autos so far, the gear looks very parallel.

OK, simple question; Is "Hang Angle" ( I wanna say "Hangle") referring to the main rotor shaft line tilting back from vertical (Nose Up) when the auto is suspended by the rotor center???

If so, is it common to add LOTS of weight to the tail of a 2D?? I'm thinking my Russian MDS 40 is waayyy too heavy.
Robobart