Marcus,
The point is these stacks use very little float but have very small pivot diameters. (stiff lower mid, softer highspeed) If the Pivot diamter was larger then shim stress and shim deflection would be less of an issue. The "inverse taper" stack allows the shims to deflect and then altimately sets total deflection with out overstressind due to small pivot diamter. The new setup is really wild as it has no hard check plate so you get deflect, layover, deflect.. :scream:
Anyway these midvales are very cool but harder to minipulate, as they go from soft to firm very quickly. I like the Showa version, with a controlable pivot and total deflection.
Regards,
Jer