The Casper Electronics DS-1 gate / feedback / oscillation mod – you can read about it via the Wayback Machine here – is my favorite weirdo / circuit-bent DS-1 mod. I have two units equipped with this mod, love them both, and have used them in many songs like “Direct Message” and “Excitation Current.” (These are both synth songs but it’s awesome on guitar, obviously, too!)

I recommend you mod the tone stack, at least, in addition to this mod. No sense in making awesome gated feedback/oscillation tones, then scooping out allllllll of the mids with the stock tone stack!