Excluding situations where single strand rappels are necessary (LONG raps w/ a pull line): Do you all rap with both ends of the rope or Biner-block and rappel single strand? I've always taken comfort in having both ends of the rope in my hands (when possible), however, after looking at quiet a few pictures on the forums it dawned on me that many of you will Biner-block and rap on a single strand even on shorter rappels. Is it an issue of rappelling smoothly? Is it a rope-wear issue? Does anyone do anything different than the biner-block method? I saw that interesting occam release mechanism http://canyoncollective.com/threads/occam-releasable-anchor.18356/ the other day. Anybody try that? the Fiddle-stick/stone knot idea is pretty cool too. Thoughts?