ok maybe it's just me...But humor me here....Isn't a knot in your leader an unwanted thing...as it weakens it?????..I could be way off base on this.....Just some thoughts.
Unless of course you are meaning above the knot used to join your tippet material to the leader....That one seems feasible!
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"I've often wondered why it is that so many anglers spend so much money on,and pay so much attention to.the details on the wrong end of the fly line.If they took as much care in selecting or tying their flies as they did in the selection of the reel and rod,They might be able to gain the real extra edge that makes it possible to fool a fish that has,in fact,seen it all before" A.K.Best
Everyone wants to excel in this sport but at the same time we let traditionalists place restrictions on our tactics, methods, and ideas. I always assumed that fly fishing was a sport that allowed imagination, creation, adaptation, investigation, dedication, education, revelation? : Fox Statler, On Spinners (Not the dainty Dry Fly kind) "Spinner'd Minner Fly"
"Wish ya great fishing"
Bill
Wish ya great fishing,Bill