Hey HammerBob, 5 years ago I started using tuff line for all my bottom fishing in Ak. every year I have a few guests who get there line wrapped in my kicker, I have 3 reels that have multiple splices in them (blood knots)and I have yet to have have a knot failure, after this past season I decided 5 years was enough, I'll respool this spring and expect to get another 4-5 years. Only other knots I use, improved cinch and uni.