This mayt be aimed at me -- you have posted to a large mailing list....
I have read on a message board, you have a schematic for the OMTI 5200
SCSI -> IDE/FLOPPY converter boards.
The Omti 5000 series that I know about are SCSI to ST506 (not IDE) and
floppy. Oh, and some of them have QIC-02 tape interfaces too..
I have a reverse-engineered schematic of this board (nothing official),
but no scanner, and thus no easy way to get it to you. But if you get no
other help, I am sure something can be done...
-tony