Full-scale bipes, carrying people have reason to be designed to be auto-stabilizing.
Models don't!
That's what the pilot provides.
0-0-0 is common on models... -1,0,0 is also common.
Scale models, OTOH, should adhere to the full-scale settings, for realism of flight...
Stearman setup is +4 upper, +3 lower, +3 stabliizer. Very obvious on the 3-views and full-scale..
Jn-4, +2 both wings, 0 stabilizer..
SE-5a, +5, +6, 0 stab.. (it's British, of course.)
I believe the Pitts uses -1, 0 and 0..