The drill formations for the Cadets' 2011 production, "Between Angels and Demons," is a mathematical puzzle with two differently costumed sets of performers constantly meshing and separating. Good thing the show's visual designer is a mathematician. Dan Potter gets inside the head of drill designer Jeff Sacktig in today's Field Pass presented by Zildjian. Download and listen. (MP3, 8:08, 7.7 MB) Have a Field Pass question, comment or request? Leave a message for Dan Potter by phone at 317.275.1212 x40 or by e-mail at firstname.lastname@example.org. Subscribe to this podcast through iTunes. Become a fan of the Field Pass on Facebook. Visit Zildjian.com. Field Pass archive.