The one occasion where I do use a furled leader (made of tying thread, I think) is when doing no weight/low weight nymph fishing. I have a few screaming orange, short furled leaders that I picked up at the BFFI some years ago, and they function extremely well as an indicator. The trick behind this leader is that it's quite short (3 feet, I think) and I prefer a long length of un-tapered mono for nymphing.
I seem to have been under the misunderstanding that Grame’s braid-leaders were also twisted/furled, which they are not, as far as I can deduce from the various Board-posts where they’ve been discussed.
Graeme splices braids of decreasing breaking strain (and hence thickness, I assume) together, and it’s obvious that will in the end form a tapered leader. Still I was concerned about the braid picking up water and causing spray.
But Graeme then impregnates the leader with a linseed-oil/varnish mixture, which I suspect completely eliminates the spay-issue, and probably also adds a little mass and lots of durability.
So - I think it’s on to the internet, find some braid and braiding needles, order some and start experimenting. I fish a lot of big flies for pike, including poppers.
My leader design is *very* simple (one or to thicknesses of very heavy nylon for the butt and 50cm of wire for the tippet - done. It works fine, but when I go for “smaller” flies (pike-small is 15-20cm) on hooks, often “lightly” dressed, this leader is way too aggressive. Here’s where I want to experiment with Graeme’s design.
There's quite a lot of chatter on the Board about Graeme's leaders, and I thinkk a search for "varnish" brings up most, and otherwise, here's a starting point.
Have a great weekend