Do I detect a note of scepticism here, Tim? I've checked all the electrolytics with my ESR/Capacitance tester which is claimed to be able to test for ESR in-circuit so I didn't remove any of the caps in order to test them. I'm relying on the meter manufacturer's claims that it's not necessary to do so and in the absence of any evidence to the contrary, I don't see what more I can do.