All of these different ways of checking tweak and balance make my head hurt (kidding), but seriously all I do to check tweak is make sure that at rest the chassis is straight, that all of the links and kingpins, springs, and other moving parts are equal side to side, the chassis is still flat, and it all moves free. I can do all of that with a set of calipers and a reamer and thats probably 95% as good as a perfect tweak station approved setup.
One of a few things I have learned is that by far and away the most important measurement on the car is to make sure the servo horn is dead center in the chassis, if its off by 0.010" you will feel it in the wheel and the car will refuse to steer evenly left to right. Also I always run a bit of preload on the rear sidesprings, and that makes the car seem more predictable. As long as everything moves free and the car steers with the same aggression left and right, I mostly leave it alone.