Ghetteaux Les Fabulous said:
.... never seen one, never even heard of one.
I posted a photo of one on page 1 of this thread which should take care of thre first part of that quote, but yes, they were a little fragile for use with anything as crude as the vast majority of K7 decks that appear in portable equipment. It didn't prevent my trying the odd few though, mostly TDK, BASF or Scotch. Even my GF-555, a device whose decks have enough torque to pull toy cars across thick pile carpet by means of a piece of thread attached to the toy and to the takeup pin in the deck, never managed to snap a TDK but it did kill a BASF that contained an entire AC/DC performance that
some naughty boy 
had saved to it with his recording Walkman. Trouble was that the very fine tape, although repairable in the splicing block in the same way as any thicker stock, would never take up evenly once there were chunks of splicing tape scattered along its length, so it would get to a previous repair and snap again at the same place.
Then there was the cost; twice the price of a 90 of the same brand would have seemed fair, but 180s were more like three times as dear however that was considered worth paying because there was a limit to how many K7s a dashing young fella could carry in his slim fitting white jeans.
Sorry, and to get this back to that sausage box I wonder; when you open one of the doors does the machine play a message telling people to mind the gap?
