Hello everyone, I have Koni yellow's and am currently riding on T-springs. After my last outing this past weekend at VIR I'm starting to think a stiffer spring might be in order. What are you fast guys running? I can't seem to find spring rates for any of the aftermarket springs to see which brands are stiffer and which are softer. I'm running a square setup with a Strano adj. rear bar. Also I assume that progressive vs non progressive will come into play so any knowledge on that would be great too.