I agree with MM. I attach a stout piece of mono to the end of my flyline with a nail knot, and then tie a perfection loop in the end of that about 3 to 5 inches from the end of the fly line. To this loop I attach my leader which is also looped for easy attachment/detachment. Works for me.
Kelly.
Tight Lines,
Kelly.
"There will be days when the fishing is better than one's most optimistic forecast, others when it is far worse. Either is a gain over just staying home."
Roderick Haig-Brown, "Fisherman's Spring"