Check out the new seat post from Odyssey.  The Convertible post from Odyssey gives you options not yet offered in a seat post.  The three-way seat post system explained…

Railed- Fits all railed seats and uses a 17mm wrench or a 5mm allen to fasten the seat securely.

Pivotal-Fits all Pivotal style seats.  The only offset or mild layback seat post available for non-railed seats.

Conversion- The seat guts will convert any Pivotal seat post into a railed post.  This works for integrated seat post frames (Sunday Ian Schwartz or Mutiny Cosmotron for example)which, until now, allowed only non-railed seat use.