Derek Roddy's is known in metal circles for his speed and endurence, particularily is bass drum technique. He recently released a drum book (posted below) on the topic called The Evolution of Blast Beats which I own and is on my reading list. Check out some videos of Derek at Drummerworld. The clinic is at Rainbow Guitars (520-325-3376) at 2550 N Campbell Avenue, Tucson, Arizona on July 2 at 6pm. I signed up for the drum clinic already. See you there. For information on Rainbow Guitars upcoming clinics sign up for their newsletter.   Available at Hudson Music