While we’ve been a fan of JD Twitch‘s edits and Optimo-related DJ sets for years, we had no idea he was part of a Matador-endorsed duo called Mount Florida in the late ’90s/early ’00s. Thank the power of Soundcloud, then, for reintroducing us to the duo’s Arthur Russell cover (“A Little Lost”) and a lengthy slice of dub-infused techno called “Riot On Jamaica Street.” You can check out both long-overlooked EP tracks after the jump, along with some remixes and a recent live JD Twitch set from San Francisco’s Honey Soundsystem party…