Mr Perceptive : Hi, I don't have a problem you joining in with this thread if you want to!
Also I'm probably preaching to the converted, but there's a good review of the 207 and other bits I have in Duncan Rolfe's Meridian Info at bottom of this page, click 200 series : 207 CD / pre : review. Apparently it's a Phillips 16 bit 4X oversampling chip.
JerryG