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I did almost the same thing 5 years ago and the fingernail still has not grown back completely and yesterday, I did it again on the ring finger.
Pasta Making Class
Canning and Preserving Class
Build this Solar Powered Hydroponic Water Garden on Wheels - MUST READ!
Do a search for 'fumes', you'll find it in the "Symptoms and presentation" section.
The link you wanted on toxicity, https://en.wikipedia.org/wiki/Copper_toxicityIMHO, this whole debate is useless because you would put the food on the spokes, not the tubes.Great Instructable