The silver lined beadhead version (another Pat Dorsey creation) of the RS2 will catch fish on most tailwater fisheries. The beadhead imitates the gas bubble the nymphs use to get to the surface to emerge. Fish it subsurface as a nymph or with a bit of floatant in the surface film.
available in 
sizes: 20, 22,
colors: grey, olive, rust, black