I don't see how the springs can do any more than a plate profile change at the lower end. It could move you up the profile faster as RPM changes but all that does is let the lever travel further, just like sliding the plate or changing the profile.
Question for someone with a "0" plate or no plate. What is your top RPM and are you using a GSK?
BTW, if I'm full of crap here or the above post feel free to educate me.
Scott