The info in this thread has been awesome to say the least. I been snowboarding for 7yrs on and off, and never had the urge to learn switch. I just bought a 2012 Rome Mod Rocker 159 which is a twin board. After a couple runs of riding duck again, I wasn't feeling that confident of riding switch. It was all in the mind and looking down hill in a different way. Once i was able to ride switch on my heel edge, I started to carve onto my toe edge. After a couple spills and a few laughs to myself about what I did wrong. I learned it quickly and now able to switch back and forth with ease. Next step is to do backside/frontside 180s.
Thanks everyone that helped in this thread