Q-bus SCSI Controllers RFI

Q-bus (BA 23, BA123 & (with mods to the mounting hardware) BA213) SCSI controllers. What works (in particular with disks + MSCP + VMS), how well and what's still about ? What I know is: CMD CDQ-220/TM supports disks and tapes, and works with RZ2x disks / MSCP / VMS DEC KZQSA-AA (aka M5976-AA) is the BA23 Q-bus SCSI controller CMD CDQ-223/TM is a 220 with EMC shielding for a BA213 box What I'm curious to know is: - What boards were made and which are commonly available e.g. DEC KZQSA, CMD CDQ-220, Dilog SQ706 ?, Emulex UC02 ?, Andromeda SCDC-11 ?, ... - The relative (to SCSI 1) performance of each of the boards - Which boards are "dogs" : gotchas, tape only, unreliability / electronics failures And, some specific queries are: - What is the difference between a CDQ-220/xxx and a CDQ-220A/xxx ? - What is the functionality of a CDQ-243 (quad board, BA213 cab kit, 2 SCSI connectors) wrt a CDQ-220 / 223 ? Regards Martin