Thanks for trying to clear up the details James, but I am even more confused than ever.
R-DAT was introduced in 1987:
https://en.wikipedia.org/wiki/Digital_Audio_TapeHere are a few of quotes from the liner notes of the Trinity Sessions CD (you probably have this, right?):
"Captured live at the Church of the Holy Trinity in Toronto, Canada on Novenber 24, 1987"
"A Digital R-DAT Recording, using only a Calrec Ambisonic Microphone"
"An MDI Production Edited and Mastered Digitally Peter Moore assisted by Perren Baker
By no means am I trying to suggest Peter Moore is mistaken, it just does not seem clear to me exactly what the source is for the new mastering? If there was analog tape capture at the time of the recording session in addition to the R-DAT referenced in the CD liner notes, great. And if Peter then went from that analog tape direct to 24/176.4 via a DAD ADC for the new mastering, great (although LP fans may not be too happy).