I don't believe a there are a lot of board members who troll crank baits for crappie. It has been discussed and here are 5 recent threads.
http://www.crappie.com/gr8vb3/showthread.php?t=7950
http://www.crappie.com/gr8vb3/showthread.php?t=7902
http://www.crappie.com/gr8vb3/showthread.php?t=7872
http://www.crappie.com/gr8vb3/showthread.php?t=7824
http://www.crappie.com/gr8vb3/showthread.php?t=7696