'Three Wire' give me a clue about 'who are U' please. I can guess (not here) but anyway your beard probably helped with 'some cabin air' nestpas? You shoulda smoked - that would help with the nasal burn. :-)
Good to know the change was contemplated (as indicated in the 'SKULL' report) but I was out by mid 1975 so did not hear anything further until seeing that report from the National Archive a few years ago now.
Changing to 'mix-air' and having the Thomson-Ferranti Gyro Gunsight would have been nice changes - but beanie counters always win - sadly.
Oxygenation of soft tissue was more rapid at altitude, my ear popping could wake me after midnight with some pain. LESSON:
'Go Low & Go Slow' 
(sounds like the current RAN FAA motto).
