Use the pinch method on Grizz's site listed on the first post of page 776 to set the LSN and idle gap then you should be tuning with the HSN for top speed, then revisit the LSN for fine tuning. Go to the site I just said and read the tech tips, it sounds like your confused on how to tune these. Grizz also put a couple good guides in the Tuning bible stickyed to the top!