Well the point is becoming a bit less critical as I just noticed the post from Ghilliebear about RTG 93 flats... which would be extremely cool to become an early adopter for, but to answer your question, the early SW Receivers were actually rolled MKE flats. The later SW's are relatively decent as well, so I don't necessarily think that I would turn one down. Going into C93's... early C93's were SW Receivers, later moving to what many believe to be Hesse receivers. I have a later generation C93 and after some tinkering, it runs well but it's no pageant winner.
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