Tie in the last wing. Spread it out again to get the previous materials covered. Tie down, trim and secure with a bit of super glue. The finish needs to be nice and tidy to ensure a small and neat head. You can comb through both wings to fuse them for a more homogeneous result.
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The Global FlyFisher has been online since the mid-90's and has been free to access for everybody since day one – and will stay free for as long as I run it.
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See more details about what you can do to help in this blog post.