Thanks Berlin. I've been trying these lately after seeing your post. I use 10 lb Ande mono and made them just like your plan except I Blood knotted 10 lb Ande onto the thin end for tippet. If I need something smaller I blood knot it onto the 10lb. They cast very well, turn over big flies and rarely ever tangle. I actually like them better than tapered mono leaders. The technique is called "furling" and you can find recipes for knotless furled leaders on the global flyfisher site, as outlined by Henk Verhaar.