Steven,

Looking at the diagram can be deceiving. When tying a double-surgeon's knot you need to pull the standing line through the "overhand" type knot that you create. The knot in my diagram doesn't involve that. I don't see how one could tie fly line to leader using a double-surgeons. The uni-knot splice looks just like a nail knot when tied, and is tightened to the point on the fly line that it doesn't slip off. The "uni" name comes from wrapping one of the tags around another standing part of the knot.

Actually, with a little practice, that uni-knot splice is a very easy knot to tie even on the stream. I have not tied a nail knot since my first days of flyfishing!

You are right about the double-uni-knot though. I normally use the blood knot to attach pieces of leader or leader to tippet, but the double-uni could be a very strong connection.

[This message has been edited by Spud (edited 10 March 2006).]