I have used most knots and had break offs at the knot. I carry spare spools for my braid to fluorocarbon setups, however, since going to the FG I have never had to use one. I fish on Table Rock and there are lots of rocks, ledges, deadfalls, and brush piles. Yesterday I had a 12’ 10# leader on my light Ned setup. By the end of the trip I had a 4’ leader but no knot failure.