I've been a sturgeon fisherman for a little less than a year. My family and I have been out for them about eight times now. We've caught some 40 inchers but no keepers yet. We went to a Fishermans' Marine sturgeon clinic last year and the instructor (Sturgeon Frank) recommended 80 lb tuff line with 130 lb dacron leader. Today while we were fishing I began to wonder why it is necessary to use dacron leader. Why not just use Tuff line with no leader? Why would you use a heavier test leader than your mainline? Also, what are the best kinds of knots to use with dacron leader and with Tuff line? The dacron leader is so thick it's hard to thread it through the eye of the hook. A couple of our knots came untied today. I've heard that with Tuff line, an improved cinch knot will cut through itself. Are there certain knots that are recommended for Tuff line and dacron?