I was, I think, 186 course at Cerney ('63). As I remember there was a gentleman who had been medically recoursed and was still a Sgt waiting to graduate who supervised our bang seat demo on he rig.. I remember that there was an SRO at Cerney saying that failing OQs one could no longer transfer to NCO Aircrew. We had at least 2 Master Pilot instructors at Acklington, and when I went to Manby as a co on Varsities there were several Master Pilots going through refresher training. I don't think I flew with any more although there were still NCO Aircrew on 85 when I held there on the Meatbox in '65.