Man, my Posty-parsing skills have atrophied. I took me longer than I care to admit to figure out what KC and ITCOTKC stood for. Now you've got me thinking. I'm not sure what version I own on CD. I have a 70s gatefold vinyl version which spent most of my college career as a dorm room decoration, but I digress...
After much rummaging, I found my 1980s copy of Physical Graffiti, which is mastered by Barry Diament. Supposedly he did all of the original CDs except for the fourth album. I'm basing that assertion off what I've read online. Led Zep liner notes are notoriously sparse. In a bit, I'm going to wake up my wheezy old Wintel, fire up Exact Audio Copy and rip it to FLAC. It will be interesting to compare the waveforms to the 1990 4CD boxed set and possibly the 1993 and 2008 versions as well.