I've always tied my own,using the chart rougetrout mentioned earlier.2 years ago I started using silk furled leaders,and now use Quigleys silk furled leaders on everything 5wt and under.For my Wife,and everything 6wt and above I still tie my own.......really like the Frog's Hair tying kit,and sometimes add a flourocarbon tippet.
Wow....I'm a bait fisherman.That just sounds wrong.