Coffee filter holder for digital scales
thingiverse
This is a simple thing for holding a coffee filter on a set of digital scales while you grind coffee directly into the filter. The scales I bought were cheap (around £5) and are accurate enough for this, there's no part number on them but here's the eBay link: https://www.ebay.co.uk/itm/361840743606 The base is designed to fit exactly the footprint of these scales, and I stuck the base to the scales using double sided carpet tape.
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