Cross weight balancing is the ultimate suspension adjustment to acheive a equal response from throwing the car into a left corner or right corner such that no unwanted surprises will catch the driver off guard.
It is common to hear of cars not clearing "s" bends on track because the sudden dynamic changes from left to right bend confuses the driver.
So to acheive cross weight balance, 4 independent electronic weighting scales are required. If it is linked to a PC with a calculation software, it would make life simple. In theory,
Front left wheel weight + Driver + rear right wheel weight =
Front right wheel weight + rear left wheel weight.
So to acheive the above, adjustment to individual coilover height will tip and change the weight on each wheel. Adjustments will be made until the cross weight balance is acheived.
Similarly, front and rear weight bias can also be adjusted to acheive closest to ideal 55:45 weight distribution.
So I fear that my ride will look terrible after the 'ideal' height adjustments...haha.