Hello all. I have just started cleaning up and adjusting my free SA-7800 and I have a question. The service manual is very straight forward and I surprised to find the only adjustments I can check are those for idle current On measuring the voltages and setting them at the appropriate pot, I see the mV at the test pins is creeping around and not holding steady. Is this normal ? I'm only talking about a slow creeping from say 53 mV to around 55 in .1 increments so I assume the tiny voltages concerned are nothing to worry about, correct ?