(TECHNO) Behind the decks (and Final Scratch software), techno innovator Richie "Plastikman" Hawtin delivers a devastating combination of advanced beat seminar and sweaty warehouse party. With Final Scratch, he can customize each track in his DJ sets to his exact specs, allowing him to transmute brainy, minimalist, glitchy techno (and the odd Nitzer Ebb chestnut) into ecstatic dance rituals. Seattle's world-class experimental-techno producer Bruno Pronsato and biggest-bang-for-the-buck DJ Jerry Abstract complement Hawtin's next-level spinning and clicking. (Showbox, 1426 First Ave, 628-3151. 8 pm, $18 adv/$20 DOS, 21+.) DAVE SEGAL