So now I have put my feet in the water and caught some fishies with the sweetgrass rod I built. Love it! I cannot see going back to the dark side for graphite or fiberglass.
Natural is about the best adjective I have found for fishing with a bamboo rod. The bamboo effortlessly loads on the back cast then dynamically releases its energy on the forward cast sending out the line to gently land a fly right in front of a gorgeous brookie. Sweetgrass gives me a more organic connection to fly fishing.
So, to supplement that natural cast you will find with "sweetgrass" I suggest using 406 Fly Line in dual taper 4, 5 or 6 weights. That's a shameless endorsement for a small right-minded company.