just slightly off topic about the bike but definiately about springs (which I know nothing about but getting there). The spring rates you mention are really really high for what I am aware of??? My 360B has a 4.0 kg rate spring and I have beenn chasing a 4.2 as I am a "little" over the 86 kg mentioned here but this is way short of what you are mentioning. I know the shocks are entirely different but is the shock rate a fairly relative thing ie is 4.2 way too low for what I would be after?
cheers
Rossco