It lives. Finally a fully operational Apple Network Server 500. After having to source a new lock, internal SCSI interconnect board, Wide SCSI to 50-pin cable, new floppy drive, a crash course in AIX and an adventure in solid state SCSI solutions (spoiler: blueSCSI failed badly, scsi2sd is solid as a rock) the ANS 500 is now fully functional and on my network. Next is to get the classics macs to talk to it. Stay tuned.