A scosh (long o) is a highly technical measurement, exactly three RCH widths (or is it four? darned non-MKS units)
The definition of RCH would likely not be allowed on a public forum, but if you ask very nicely in a PM, I'll fill you in. Think, "fine as a frog hair," and you'll be close.
You don't have to be from the country to understand it, but it helps.













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