Setting tweak:
Assemble the car as ready to run, minus body.
Place car on the edge of a table with front end hanging over the end of the table.
Have the tweak screws just touch the chassis.
Put a coin on both front wheels.
Slowly lift the car with a knife put under the middle hole in the chassis's front
The side on which the coin drops first the tweak screw has has to be screwed in further. Loosen the opposite screw as much as you screw in the first.
Repeat till both coins drop together.