I generaly decide what to put on the tail of the plug first by the number of hooks on the body of the plug. If there is one trebel on the body i put a swash on the tail. If two trebels are on the body thats enough sharp stuff and I use a flag. I have not noticed a reduction of action by using feathers as opposed to bucktail but i wasn't thinking hard on the action I was looking for additional lingth of bait.
