Mine doesn't have the floppy convertor as later revision of the disk module supported 880K and 1.76MB floppy drives.
I was told by Amiga that i have the last revision made of the Amiga A4000T, it has a high density drive fitted (Sony with Amiga Technologies sticker on it). It came with a spare disk module one fitted and one located in a box.
I brought mine brand new after selling my A3000T.
I must say your post was very detailed must have taken you a while to add all that information.
I noticed your coin battery has been removed or not present.
It's worth mentioning that Workbench 3.1 came with extra manuals for the A4000T & Workbench 3.1 disks which has the extra files required for the A4000T i.e workbench.library.
I also have spare blanking plates,drive rails, tower case feet and cpu riser pins.
They are certainly nice machines!
