I've got the following in my working A4000D:
1) GVP060 accelerator w/128 megs of RAM & a SCSI2 cable out the back
2) Picasso-IV (video connector unbroken) w/the Concierto, Pablo, & Paloma daughter modules
3) Deneb USB Zorro card with the 2 USB ports edge connector dangling out the back (due to the P-IV needing 2 edge connectors) & an all-in-one multicard reader/writer (including 1 USB port) installed underneath the top floppy disk
4) Vortex Golden Gate 486SLC2 with the FDC & math co-processor chips plugged into their respective sockets + 16 megs of RAM + the Monitor Master dangling in the back
5) FastATA 4000 MK-??
6) unknown PATA HDD
7) DVD writer with DVD-ROM capabilities
C64@MP3 card on the DENEB's clockport with its output going to the internal L+R leads on the DVD writer
9) Catweasel MK2 Anniversary Edition on the IDE line dangling out the left side.
How about a 2000D and a 3000D that makes 5000D, 1000 more than a 4000...
