I will be coming to the Repair Workshop both days this weekend, and I am bringing some Macintosh SCSI hard drives that need data recovery. ?Are any of the folks who are coming able to bring their tools/knowhow for imaging misbehaving SCSI disks?

If the disks still spin, ddrescue is as good as anything for imaging marginal drives. If you also want to do data recovery from the saved images, I've personally had better luck with COTS tools than open source.  I can recommend Disk Drill PRO. -Jonathan