One other thing to consider (and I can't help but wonder if it makes a greater
difference than initial toe in or out setting) is the angle (camber) of the
tire as it sits on the ground. The camber obviously changes with the weight on
the gear at any time. The problem is the bias ply tires that are on light
aircraft. They normally tend to want to steer toward the way they are leaning
as slight as that may be. Inflation could also effect this tendency.

Jim