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True. A circular plate can give optical quality. A male or female slump form would have to be near-perfect or it will show any imperfection as the wheel rotates.
I'd go with aluminum, else paint a spiral on it.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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