Did the M-400 back in '04-06 have the extra thin U shape or the regular thin U shape? The old websites doesn't state which shape they have.
My M-400 feels like an extra thin U (feels the same at the m-1000 i almost bought) and the S/N starts with R06. I bought it in 06 but it has the black nickel hardware that was on the 07 model's spec sheet.
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