My leafs flexed from one maximum to the other, no problemo. even had an extra main leaf shoved in there to help reduce spring-wrap. My personal view is that a many guys are running a front end that's a bit too flexy for most terrains. and combine that with almost no weight over the rearend, you get an unbalanced system.
but either way, before going all gung-ho on fabbing in new leafs, find the spring rates of both and compare. :thumbsup: