Feeling chuffed after stripping down the motor of a Mainline J72, cleaning if, figuring out where all but one of the little bits should go when reassembling and then finding the whole thing runs as smoothly as modern models.
Its probably got a pretty good claim to it and the body-shell can still hold its ow, but now I've cleaned it thoroughly [look Ma, no soldering] it not only runs well but doesn't smell of burning motor.