Has anyone made a patch yet that would switch from a clean amp to a dirty amp by using the expression pedal, and willing to share that patch? When I had an HD500, I had downloaded someones patch that did this, couldn't figure out how they did it' but with the heel down, it was a clean amp, and as you went towards toe down, the dirty amp would start kicking in. It was a seamless change. Worked great for the song Kryptonite. Thanks Dan