I use my 2-handers with dry flies for steelhead quite often. I have not had to false cast to "dry the fly" as people have been taught to do with a single-hand trout rod. It is not necessary to use anything other than standard spey casts to properly fish a dry fly with a 2-hander. Since we are picking up a fly and casting it with considerable energy when spey casting, the cast itself removes the excess water from the fly without false casting. I have also used dry flies spey cast with a single-hand rod and have not had problems with water-logged flies.