if people scales weigh people correctly, what happens if said "people" hold part and get on scale, then set part down and get back on scale, subtracting the difference ? would that get a closer part weight ?
Its still not a perfect solution. I've tried several things, and this is with perfectly calibrated competition weights. Its hardly foolproof. Actual parts scales, or dairy scales, scales made for stuff and around the range ov weight you're using... thats the way to go.