I don't remember those (could've been in the period when I checked out of tech for a few years) but I had a RANA floppy drive for my old Atari 400 that died from dirty power and I think you may, in part, be onto something. There was a blog review of the FSP PSU that I read that also heavily emphasized making sure the connectors on both ends of the cable are plugged in order to prevent damage. If you ever end up with one of these connectors you'll see what we're talking about with the less-than-assertive feeling when connecting. A click sound is no longer enough.