i wanna check the springs im running on the 5

am i right in thinking i need to corner weight the car,
then disconnect the strut top and weigh the weel/brake/hub/suspension....
then work it out from there?

is there a better way?

any1 got any advice?

then how do i work out the rates i need for the new springs? i think i had a program somewhere that works it out but will have to check later.