Only an idea so far, but seems promising as a new way to catch sockeye in the delta area.
To address the problem of slow current in the lower fraser near the mouth, I have the idea of inserting a round lead weight inside of a golf ball size rubber ball, and using the ball as a weight, to be used with standard flossing techniques.
The rubber ball weight will reduce the buoyancy of the lead metal core and together will is bullky size, this should insure that the current will move it along, thus standard flossing methods should work.
I will try it this weekend if I have a chance to get out. If any one else tries it, let us know!