Note for PJ2 - trying to follow your link to 'P114', but please be aware that page numbers here are meaningless since they depend on individual settings of posts per page. If you can link to post numbers that helps.
Re VS - is the AB system like the Boeing? Initial Inertial reading with time related barometric damping? Are you referring to some sort of pilot selectable 'selector' between IR and baro in your post #1080? "There is an "ADR" and "IR" vertical speed selection I see." or is this software driven?
Why would PNF feel the need to change PF to 'IR3'? Does this indicate that IR3 was giving erroneous info?
Why all the queries about SS inputs left and right? Surely the FDR trace will show who was doing what?