anyone seen Joe Humphrey's nymphing dvd?I watched it the other night.He took his nymphs and rubbed them on wet rocks to get any foreign scents off them and to ruff them up.I had never seen anyone do that before,wonder if it works.It's a real good dvd,he tries his best to explain how he fishes nymphs,in different waters.His rigs,casting techniques,and sinker weight relative to multi nymph rigs relative to the velocity of the current of the stream was pretty technical but he catches lots of fish and he's a master fly fisherman,which doesn't hurt anything.