Ok,
So I am 100% sure that I have all the expansion disk upgrades, because I have a gauge panel (g).
here is just the AOD folder overview:
https://ibb.co/Xs23fP4
I have tryed re-unchunking my copy of the expansion disk and this is what I got:
https://ibb.co/pZ4G06R
Not sure How I got it to unchunk but I am pleased to say that I (normally) should have the fully upgraded version of DOS AOD (but no OLM, though).
Once more thanks for all your useful help
Happy Hunting!