Frank and Joni can probably correct me or know better than I. But I have become a fan of the "Speed Nail Not" or "Nailess nail not" It is a heck of a lot easier than using the nail which in my case happens to fall often (Corrdination strikes me every 10 minutes and when it does I am baffled)
I feel this not is as strong and basically does the same thing and for me it is easier by 10 to 15 minutes of coordination.
There is two video's on Google video demonstrating how to tie it. Here is one of them
How to tie*a surgeon's knot when fly fishing | Wonder How To
My two bits but I yield to the more experienced Fishers than I. I trust their views far better than I.