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enter image description hereenter image description here I need to make a simple yet sensitive balance scale with a single pivot point, as shown. I can also make a Roberval balance scale which requires 6 pivot points, as shown. But wouldn't having 6 pivot points increase the friction experienced by the scale, thereby lowering its sensitivity? I know a Roberval scale automatically levels its pans, but if it has less sensitivity, I wonder if it's worth it?

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