chicorider
Zen MBB Master
On the question about the stiffness of the leaf spring...I have a S30 as well, and the rear suspension is meant to be only enough to take the edge off of anything you might encounter on the road--driveway lips, minor road surface irregularities, train track crossings, etc. Compared to my V20, the S30 is not that much softer, which I appreciate. I don't see how you could easily make the S30 stiffer, but it's pretty stiff as it is.