I've decided that many of you may benefit from a cathode resistor change: from 470ohms to 560ohms. If you find you are cranking your adjustment resistors all the way clockwise to lower the current (and I suggest 34mA for idle on the Hammonds), you are a candidate.
This is purely elective, though. Let me know if you are interested, and I will happily mail you four 560 ohm resistors free of charge.
Shannon