This is called a AG chain knot, JM has been advocating it for a decade, but only few anglers have taken it as a knot. Most said it's not even a knot, but it's tough, not even a tiny twist at the leader, keep 100% of the strength. A protect fabric tube is also necessary. This knot is only suitable for flourine carbon leader. This is a poster that they never released, I gained it from Mr.Liu privately, he allowed me to post it here. I'll be back to post the steps.