Billy Howerdel is one of my all time favorite musicians. His work with A Perfect Circle was an inspiration for me, and really encouraged me to get into recording. Before he formed A Perfect Circle, Howerdel worked as a guitar tech for Faith No More, Fishbone, David Bowie, The Smashing Pumpkins, Nine Inch Nails, Queen, and Guns N' Roses. Since A Perfect Circle went on what seems to be a permanent "hiatus" Howerdel has been working on what could be his first solo album.

Here's a run down of his guitar rig, taken from Guitar World a couple of years ago. As you can see, he is a big fan of midi switching and rack gear. The guy would need to have spent years as a guitar tech just to figure out how to wire this stuff up correctly.

I actually picked up a Lexicon MPX G2 myself, and whilst it can sound pretty cool, the unit is hardly intuitive to program.