Point your Fly rod at the fly and pull on the line, essentially taking the rod out of the equation. I'll bet you ten bucks you can break you're 20 lb tippet if you don't have too much line out*. As you bend the rod, the pressure decreases. When the rod is in a bent u going straight up then down, you really aren't applying much pressure. But if you again point towards the fish and pull with the BUTT of the rod, now you'll see some increase.
That being said... I fish 12 # exclusively. Why exclusively? Cause I'm too cheap and go and buy more line. I've got 12# Berkely Vanish(yes that dreaded stuff) and it works. I have no complaints.
I do agree that many FF'ers spend too much time trying to complicate things. To quote my engineering boss "Simple Easy".
*The more line you have out, the more the line will stretch, the more you'll have to pull (distance) to get the same net result.
Last edited by Nick; 09-19-2002 at 10:55 AM.