Even with a balance beam, who is to say that beam was properly calibrated at the factory and the markings are in the exact right spot?
Are you 100% sure that you are looking at the scale from the exact same perspective each and every time you look at it? A few degrees off from your view point could mean a tenth here or there.....
I understand being anal about charge weights, but don't fool yourself into thinking that a mass produced balance beam scale is somehow any more or less accurate than a mass produced digital scale, all things being equal with the person using it.
I have both and use both, though admittedly I can't remember the last time I used my balance beam anymore. My Chargemaster just works every single time for me.
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