Verci
The 'six' were the responsibility of the unit training section and I only repeat the information that was given to me at the time. The DG of the time will confirm that he was given this brief as well.
I would suggest that you pursue your case and seek full details either with the then training section or the aforementioned DG.
I appreciate your concern for details, but it seems I have to repeat myself already:
I have a feeling their OJTI's will disagree quite strongly with you on this
I don't really care what the DG or other managers at the time thought, I think the comments from people who actually worked with this group (OJTI's) speak for themselves.