The nail knot has been around for centuries and many knots we use today were derivatives of this very proven method of connecting two lines together. Since 1938, with the invention of nylon fly fishing has changed dramatically in certain ways. Nylon caused a jump start of other later mediums such as Dracon, Spectra, and PVDF. The ironic thing about technology is that it does not always change the simple things that it supposedly enhances or try's to make better. Many times technology is humbled by its own simple archaic functionality. Plastic fly lines have changed over the years and even silk has evolved and blossomed. Many fly casters say that the quality of the tapers have changed for the better. Others say lines have only suffered with technology and all of its gimmicky growing pains. Knots really have not changed through all the technological breakthroughs. The knot is still the single most important part of fly fishing . Without knots you cannot fish, period. Without knots a...