After reading the following on baileyrock's thread, 07 GSXR 750 track set-up???, -->the nerdy engineer in me wondered why there aren't dynamic velocity stacks... they would be fairly easy to build (especially if run linearly with rpm opposed to a parabolic or system tracking curve), and by running dynamic stacks you'd be able to harness that "low/mid grunt" and the extra "top end power". Does such a thing exist?