I was watching a video on wet fly fishing by the famous wet fly guide in Arkansas... Wooten I believe (i'm bad with names). He suggested that one can use finer tippets on a swing, after the line goes tight, by taking your finger off the line and let the drag take the hit. He suggested that the drag when added with the fishing diving back to the bottom would be enough to set the hook. One has to set the drag for the operation, but it makes sense to me. I'm going to give it a try.