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Mainly...I don't want an oddball. And seeing there's a funny spindle thread (if true) puts me off.
The word "Schmarn"is genuine bavarian German.In Bavaria Schmarn has the meaning of a joke,nonsense,rubbish or bullshit.Kaiserschmarren is more or less a shredded pancake.
The reason you need a collet chuck is to allow working on a piece of material, taking it out for another operation and putting it back with good concentricity assured.
Marv, what is a pot chuck? I haven't heard that term before.