Remember that everything that is "stock" is really just an approximate. Each of our airplanes requires exact calculations to ensure equal movement of the flaps and elevators in each direction. Howard has a nifty program that enables us to do a much more precise setup for each plane.
I'm getting ready to make a fully adjustable bench top fixture that will allow me to set the exact control system measurements (placement of all components in every plane; vertical placements, distance between the TE of the wing and the TE of the stab, etc. ) of my next intended airplane and allow me to adjust all the "angles" until I get as close to equal movement in both directions of both the elevators and the flaps as possible before I start building.
In the past we have mostly relied on "after build" adjustments to achieve our flight trim goals. Taking a lot more time thinking about and planning out the complete control system geometry is time and energy well spent.
Later - Bob