I have had this SQ disc for many years, never saw it for sale anywhere either, mine came from Ben Bauer's estate. It is so-so in terms of discreetness, some cuts are decent quad, not great, other are poor. I haven't played it in years, but it wasn't one to list a demo material, other than for rarity and oddity sake. Also on EMI from the UK, I have a Q8 of Show Boat, and the jacket only from the SQ disc of same, so I know both were made. I have never seen these elsewhere either, some of the EMI UK stuff seems to be very obscure and little known. The number of Q8's they released is a mystery as well. A further oddity is the relationship of EMI in Japan, where they were tied with Toshiba, who was a RM/QS proponent, with a slight CD-4 release schedule. So, many EMI albums seem to have been done in Japan, in RM, or at least the labels say that. I am waiting for my copy of Atom Heart Mother to arrive on Toshiba-EMI, I want to check the runout area for the inscriptions, to see what master they used. The disc label has the UK number in small print, so I'm thinking they really used that master, but labeled it RM since Toshiba didn't do SQ in Japan. I have an Angel label Q4 factory reel on the way from Japan, that also is strange since EMI didn't do Q4 anywhere else in the world as far as I know. It makes one wonder if in Japan there were Q4's of the heavy hitters. such as Pink Floyd, ELO, and their other SQ releases in the UK. When the Angel reel arrives I'll scan and post it. Happy Holidays, Nick