Fly Line Loops
The two nail knot system is MUCH stronger than the whipped loop.
A couple of suggestions though:
If you make the nail knots out of 40 pound GelSpun they will be stronger than made out of 10 pound mono.
Remember to cut the tag of the loop on a taper and then I coat them with Pliobond so they will fly through the guides.
Regular Loon’s Knot Sense is OK but I tried the UV stuff and it peeled off after a season.
Hope this helps .......