Just curious, "back in the day" I touched a *lot* of 3 1/2" ST412 style drives, mostly 10mb and 20mb. But these days I never see them. All the drives I see on ebay and elsewhere are 5 1/4" monsters. Any idea why? I'd love to have a handful of 20mb 3 1/2" drives to use for various things but I never see them. I'm talking about drives from Rodime, Seagate, Lapine, etc... cerca 1985. -brad