Re: Existence of a Slide Blend Pot?
Just a couple of things to keep an eye on; many DJ "crossfader" controls like this have a specialized taper that brings in the other side of the mixer very suddenly (it's used for scratching techniques providing more of a "killswitch" effect with less fader movement), so they don't work gradually pike a blend/panpot does. I know of many EDM DJs that crossfade between tracks using the upfaders, and only use the actual X-fader for slamovers, because the crossfader of the house tables at each club they mix at might have a different pattern.
Second, most of these crossfaders are designed to have a very light touch with low friction (again allowing quick small moves). If you're mounting this on a guitar to blend pickups, you're going to want something that stays where you put it as you dance around on stage.
Just some things to keep in mind while browsing the crossfader market. It used to be that several DJ mixers conformed to a standard for replaceable crossfaders, so aftermarket options came in this panel-mount setup that just dropped into the mixer surface, which would probably be perfect for pickguard-mounting as well. Unfortunately, that was high end at the time, and the high end was the first to go digital followed by everyone else.
