Kurt Ballou, of GodCity Studios and Converge fame, recently sold a handful of his business cards. The cards double as a distortion pedal schematic, which you'd have to have some technical knowledge in order or to put together.
Mutoid Man/ex-Cave In's Stephen Brodsky is just that man, and he made it sound great. Plus he uses Kurt Ballou Signature Drum Series to do all the background drums for the riffs as well… because apparently if you're going to go Ballou, you might as well just go all out.
