FCO for KDA50-Q?

Can one really plug such drives into an Standard Disk Interconnect directly, or is the interface standard merely 'close'? (I don't know, merely raising the question.) I'm not sure that's a fatal issue; maybe it just causes the controller to have to re-read that last block? One could certainly write a hack work-around (re-read, extending the transfer size one block). Generally DEC indicates the ECO level by a stamp or something similar on the module handle(s) on the back side. I looked at a couple of M7164/M7165 board pairs which I have (which seem to date, from the date codes on the ICs, to the '87-'88 timeframe - the ECO seems to be Apr '84); the M7165's were both B14, and the M7164's were F4 and J04 (I think - that was on a sticker in the right place, and I don't see anything else). The two short cables are pretty generic, from what I can see. Ground plane backing, but other than that, stock 40- and 50-pin flat cables. Those should be easy to make. The bigger issue is the cab-kit, which is almost unobtanium. There's a guy on eBay selling a bunch of NOS UDA50 board sets, which include a cab-kit, which is, I'm pretty sure, the same as the KDA50's - alas, the KDA50 User's Guide doesn't give the part number, so I can't be positive (the UDA-50 one is 70-18455-6K). Alas, he wants a ton of money... Ditto! Noel