Leo,
I have to agree with Tailingloop here. A 3 turn Surgeons does it about as good as any I've found.

I got into the habit of using it on a trip to the Mo. a few years ago. Seemed to be the best knot I found for attaching flouro tippet to mono. A "2 turn" would sometimes fail so I just use a 3 turn for most applications now.

Works very well for me.

Jeremy.