Green Butt's hitch version is good for small salmon rivers. It's small size is perfect for spooky fishes and grilses. It's recommended to use floating line and short leader to get the fly swim on the surface.
Riffle Tubes are probably the most enjoyable way to fish salmon. You'll see the fly all the time as it moves on the surface and will see as the salmon takes the fly. In riffle tube flies the line is not going in from the front of the fly. It will go from the side which will make the fly swim across the river.
See Henrik Mortensen Cracking the Code DVD how hitching is done. See the trailer for preview.
By Fulling Mill.