Seamus,
Just to set the record straight on Floyd, at the risk of removing some mythical connection to QE gear. (truth is better than rumour unless you are a celebrity)
I recently spoke at length to James Guthrie (Pink Floyd FOH and Mixing engineer for several decades now) and he does not recall any Floyd records done on QE gear. Most all of the Floyd was recorded and mixed at Abbey Road, EMI, Air/London, Olympic and a few others and these studios were outfitted with Neve, EMI, Amek, Helios, and a very few SSL desks at the time.
I will not rule out the possibility that somewhere Floyd got engaged with a QE desk, But I want something other than heresay. Printed or photographic evidence would be best.
HOWEVER !!!!
James clued me in that London had several QE desks and one he remembers well (as a tape-op, assistant and early engineer) was a custom 3-band QE desk at Advision, London in the early 70,s.
Check this page for a good but incomplete customer list.
http://www.sound.co.uk/studiotv.html
(Yes, Pink FLoyd is on the list and I will check to see if the QE was there at the time)
You can also google Advision studio London to see what comes up.
This desk probably had the same MM-310 type eq as the bright orange Motown-West modules we are re-racking at QE in Simi Valley.
So 70,s bands like, Gentle Giant, Yes, The Who, Emerson Lake & Palmer, Elton John, Kate Bush, Eric Clapton, Camel, David Bowie, Aretha Franklin, producers like Geoff Downes, Kit Lambert and Eddie Offord would have worked their magic thru that desk.