How do you find the car's center of gravity in the Z axis?

[glypo]

Yeah you are right. I should add two notes really.

Lock at the right ride hight. Easiest way is to just adjust the droop grub screws (do tenth cars have these? I can't remember). My ZX-5 is all the way upstairs.... way to far to go and have a look lol.

My other note, the ride height is from the point of the tyre the car is balanced on. Tyres have a rounded surface, so you need to add this difference. See diagram below to see what I mean.