do you know why you need toe in.
to make up for clearances in the steering components.
with a car being driven down the road the tendency for the front wheels is to be directed/pushed outward from the car.
but
what we want, for a few reasons, is the front wheels to go straight down the road inline with the frame of the car.
so
the amount you set the toe is in direct connection with the the steering componants of your car.
a car with loose tie-rod ends for instance will require more toe to achieve the correct direction the wheels will be pointed when the car is in forward motion.
and
a car with all good steering components will require less toe.
so you need toe-in because of clearances in your cars steering components.
and that's why you need toe-in.