Druziv,

I've got a late 60's version of one of these that helps for tiny detail. Our school was about to throw it out and I happened to notice it. I use it to find splinters, do fine soldering work, etc. If I need extra magnification for that tiniest sliver of invisible metal sitting right on a nerve in my finger, I wear some readers underneath. It along with a nice work light make quick work of tiny tasks and might help with your fine knot work.

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I love sanding.