This is a frequent sight around roadside stalls, as cooks get their knives sharpened. this is nothing but a gear that works in tandem with the bike chain so it’s quite a simple mechanism really. I’m sorry I couldn’t get a clearer shot, but you can get a general drift of things. I find it quite cool how commonsense can help create awesome and usable technology!
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I wish he came riding down my street from time to time. He’d have a new customer!
He looks kinda scary in the nights though Judith, the lighting setup isn’t lets say appropriate!