I've recently added Sounds Of The Quadra to my Kontakt 4. And I have to say it is absolutely stunning. I sold my Quadra about 9 months ago (too expensive to maintain) and am delighted with this emulation. Sounds like the real thing but without the leaky batteries or corroded membrane connectors or compressed paper cheeks (no really)
Here is link to Site with youtube clips:
http://www.synthmagic.co.uk/
Enjoy
