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They're very easy & satisfying to make yourself (not to mention cheaper), with the bonus that you can make them exactly the size you needhttp://navi.modelisme.com/article332.html
I know I used to do that using a cotton reel as a kid Gretzschel, but I cannot for the life of me remember how to do it..... Can anyone explain it again for me please?
Maybe a slightly faster and easier method with still satisfying results would be the classic "Knitting Nancy"