if you mean the out of phase setting for guitar. Yes, i have it on both my tele and strat. Its just a very simple mod if knowing how to wire yourself.
I dont really listen to anyone who use it. I did the thing on my geetar just for fun since theres nothing much involved in it.
anyway, we dont always need to listen/know whoever is playing a geetar with "so and so" mod to have that mod. Theres prolly nothing rocket science in geetar. if anyone bother with some electronic basic, theres lotsa things that can be done. Without being led around by "who and who" are using this on their geetar.