it does have some adjustment to it, but mostly just rough adjustment. most run it w/ an afc.
yes it will change the fco point. it depends on how you have it adjusted, which chip you are running, and if you have it in conjunction w/ an afc or not. it doesnt eliminate it like some people think, but it does move it up pretty high. you'd have to have the settings whacked out to hit it even trying to.
btw, im in ky as well. check out the mid-west section. we have a ky meet setup for 23 sept if you havent seen it yet.