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I did ;-)

When I flipped the switches to put it in triode mode, I checked the bias (at 10 minutes, 30 minutes and two hours) and it had shifted slightly to the cooler side. It's funny; not since my first time turning it on has the bias meter given a different reading after 10 minutes - started cold and leveled off 'on the mark' for each tube by the one hour point.

I can't give exact bias voltage data because this amp doesn't have accessible test points. It just has a bias meter. Flip the mute switch, then hold each of the eight output tube metering switches while viewing the meter - adjust the adjacent potentiometer as necessary. It's rather ergonomic, if a little less romantic.

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