Know I have scanned the Internet on knots for attaching nylon to fire line. On many places they say that the Bristol knot is the best in combination with Bimini Twist. According to my tests there is no need to use a Bimini Twist. The fire line will break easier then the nylon. The best knot I have tested yet is the Yocatan knot. Just remember to wrap the braid at least 15 times around the nylon. With this knot I get a strength around 7.5-9 kg on a 12.8 kg fire line. With the Bristol knot I never exceed 4 kg with the same fire line…..