Thanks for you input. Yes, correct there is more than one way to skin a cat, and l aggree that if you use the no knot and screw your leader system up and need to sort it at the time, you would have to cut the NK off and re- attach a new leader with a nail knot or some other.
I do not use this means for sunk lines only floaters.
I used to form my loops by the process of stripping back a inch of the fly line coating, double that back and whip with thread a small loop. From that of course you can go loop to loop ar tie the leader directly to it.
I of course see very many clients with all sorts of means of connections, fly/line to leader. Some are beyond belief l can tell you , how they manage to get the line through the guides is miracle. I also see a great many fish lost when the junction causes it to become logged in the tip ring, and l have seen rods break because of that cause.
My personal view is that. I want a smooth transsision through the tip ring, a means that does not reguire constant attention to maintain line tip float, one that when fishing flat calm water does not cause undue surface disturbance, which as you know will spook fish at times.
Any further thought will be of course most welcome.