In some of the later episodes of The Woolpack lake 8 it's been noticed that i have changed over from my Delkim ES bobbins to my old set of Fox Swingers and there is good reason, tightening up. If you have read the article Kick-Back (https://thecarpcatcher.co.uk/thecarpcatchers_blog.php?post=425) you will know that the weight of the bobbin is important in the setup as it helps hold everything tight and keeps it all in balance. Another important point about the Fox swingers is the way the clip works and the fact that they show up drop backs far better than any other bobin i have used. Again with the kick-Back setup this is important because the first indication you will often get is a drop back as the tension in the line is released on a pickup.