One additional suggestion for any knot,,,,,apply a thin coating of Loon Knot-Sense and hit it with the UV flashlight,,,extra smooth through the guides.
Any knot will hold "until it begins to slip", this is why Zap-A-Gap was developed for FF and Loon Products introduced Knot-Sense.
Zap-A-Gap was developed as a water proof "Krazy Glue" by a West Coast FF who was also a chemist,,,,,He would tie up knotted leaders with a simple overhand knot and glue them solidly. (this was via Bill Hunter owner of Hunter's Angling Supply).
Regards,
FK