Many thanks, Grasscarp.
I know the site and had read that, but I've now copied it, to print it out and drop it in my AICU 'dossier'.
(French no problem, I worked for Elliott-SFENA!)
I also have the BA notes, which are quite detailed functionally, but don't go "inside the box"..... that's why I'm still hunting for the CMM with the block diagrams and schematics.
The system was manufactured by the BAC Guided Weapons division, and I'm not sure what they have morphed into since.