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Hi Sonny, I raised your question with a friend before starting the build. My friend is toxicologic and environmental medicine expert here in Sweden. He said that as long as the food does not touch the galvanzied metal Zinc poisoning is not a problem. This kind of build does not cause zinc poisoning as you describe. However it might be worth mention that you should avoid galvanised metal in direct contact with yopur food.
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Nice project, I'll make one. However I wonder where you got the drill from. Looks like you have a drill with a thin top specific made for the jig. Can you buy that in a regular hardware store?
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@Drake88. Thx for the warning. I looked at this matter when I found the barrel. I concluded that you should not use a galvanized grid with direct contact to food but it should be OK with this barrel.
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