When I first read Jim Leisenring's book I had never heard of a dubbing loop and I thought that his dubbing loop technique was very intriguing but sure looked like alot of trouble. Now I have learned to make a dubbing loop right on the fly, I really can't imagine why I would do it on a dubbing board or on my pants then tie it on to the fly. Given the same thread and the same dubbing material, why would it matter if the dubbing loop is twisted right on the fly or twisted off the fly and then tied on? I have to admit to never twisting dubbing loops off the fly so I would have to listen to anyone who has a good reason for doing so. Any thoughts?