DOD FX56 American Metal

I think Mark would have squeezed this in a bit more compact size, but i got it "down" to 21x29. So super brave folk may aim for 1590B, but rest of us may want to give this a go with 125B or 1590BB instead. Layout is based on a schematic which was provided with the original units, along with stickers and other paperwork. Circuit has some similarities with Boss HM-2 Heavy Metal as the youtube demo below suggests. Sounds pretty mean.