^^^^^^ No. See above. AFAIK, all PDP-10 TU10's are Slaves. TU10's used on an -11 need a Master and Slaves, I don't know if the ones for an -8 are the same. The TU10 prints don't seem to indicate that there is more than one type of Slaveax, and similarly for the Masters - there is just the one type of each. This one is from an -11, though. No idea. And no idea about the condition of the motors, compressor, etc, etc, etc. Like I said, this one "is in good condition", from a purely external inspection. Noel