In the process of scheduling a trip to the Mack with Clif and the Stream Stalker my eyes wandered over to the ad bar in Gmail. The Google Ad claimed "The Easiest Fishing Knot". So, naturally, I had to follow it. The specs say it's for hook/lure eyes 2.1mm loop inner diameter and larger. That would cover every tackle setup except for most trout flies. It ties a 5 turn Uni-Knot, and according to Lefty Kreh it's one of the stronger knots he's tied. If you shop around you could probably pick one up for under 30 bucks.