Does anyone here currently have a functioning RK05 drive?
Yes. Well, actually I have 2 of them, and an RK05F
Has anyone here ever brought one back from the dead?
Yes, again. Done head replacements, rebuilt the blower fan, fixed logic
problems, and even once undid a field-circuit bodge where they twisted
together the ends of a broken wire in the interlock circuit (ensures the
heads only load when a pack is in place) without soldering. This would
open under vibration (say during extensive disk activity), and then the
logic would retract the heads as a safety precaution. Took a long time to
find that one, seconds to cure it!
-tony