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Next time you see one in the charity shop window you'll "just know" it's meant for you... placed there by a great benevolent cosmic entity.

For dispensing a rough amount before trickling the rest on, you could use a gunpowder horn or an old sugar dispenser.

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Don't have those scales myself, but are you using it on battery power or on mains? Line power is noisy and would worry me far more than a nearby fluoro light in terms of interference spikes.
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