I do an overhanging knot at the end of the braid , then put a loop in line folded over on itself, slide knotted braid through loop and pull loop tight to braid sliding it down to the knot ,Its a secure way of doing it and not obtrusive , A lot of Continental feeder anglers use this, including sponsored ones this is where I got the tip from.if you need to change length of line just remove looped end from braid and replace with new line, the best thing about this is that you can put same length of line on without cutting braid and knotting it, can be changed in a couple of minutes.