Bobby
The differences are what I am trying to figure out. I have read somewhere that the Canadians “did their own thing” in relation to section reference numbers.
In much the same way as the RAF, creating and deleting as circumstances changed.
As a result not all codes are the same. Different aircraft and different stores etc.

The RAAF as you know had their own system which incorporated the RAF system when it came into effect, over a period of time, but the basic principle of their original system stayed in place until NSN’s were universal.
In all cases these codes or extra “letters” are about the management of and the assigning of management responsibilities to the correct teams of bureaucrats.

This must be a big day for you, your first post on the forum, congratulations.

In relation to AP1086’s I most likely have them and the 2 preceding vocabulary AP’s as well.

PM me as I think we may have a bit to discuss.