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That's not a crappy voltmeter, that's an accurate one. Voltage fluctuates a lot in a car. The alternator has to provide a higher voltage than the battery for it to charge, and depending on RPMs and load it may sag it idle or low engine speeds.
Cyberdyne IIRC = Nordskog. I've seen the Nordskog, they work well, but look like they are home-made up close. They look fine from the standpoint of readability & labeling. They work well.
You may consider the Spa digital gauges. They are nicer and combine two displays into one. IIRC they aren't much more expensive (like 1.5x buying a single Nordskog).
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