Guys.. How do you know how far you screw the "C" spacer on the Dampers. I'm guessing you adjust these to try and have an even weight distribution on your 4 corners?
Any help appreciated.

yep thats right as well as adjusting the ride height.

You have to know the total weight, the front-rear weight distribution and the left-right wight distribution then you can work out the correct corner weights for each corner .