I built a 12', 3/1 bamboo (switch) rod last Fall to use for Hybrid Striped Bass and Steelhead. Lots of cover on the streams that I fish and a long cast is ~50', so the Spey/Switch rod seemed to be the way to go. I built it mainly for the horsepower to throw flies for Hybrids, also the length made it easier to hold the fly in the seams. All in all, good all the way around.
R