Take the chassis plate off the car, with no screws in the plate, place it on a known flat surface. Granite surface plate is ideal, however, not too many people have access to one. A nice thick piece of plate glass is the next common choice. Tap on the corners and listen for hollow clicking of the chassis plate slapping the surface from the corner(s) that aren't touching the plate. This is if you suspect that the chassis is tweaked.
Something that you can't rely on, however, is all springs being exactly the same length. Even when they are new. Setting the shock collars with a pair of calipers is good for getting them close. But, you will need to make fine adjustments to get equal weighting on the springs from side to side. This is where the tweak station come in handy.
Something else of note; I know a lot of drivers here state side that have given up on the blocks for setting droop. Most set-up sheets now-days is measured over ride height, even for rubber tires. Keep that in mind when looking at various set-up sheets.
Speed Merchant Rev7, Tekin, TQ Racing (wire), Team Tamale
RC Excitement - Buy where you race, support your local tracks.