So now with bias pot at 0R. Readings such:

Va 372 V
Grid 0V
Cathode 26V

No DC on tone stack side at all, each tone stack cap reading Dc voltage across also.

After adjusting the bias to about 45mA the Cathode reads 37V. So just to be sure that things seem ok now…my bias pot is now at 500ohms and the voltage is 37V across it with 45mA of current. So its power across the pot is (37V * 45e-3 Amps) = 1.67watts correct? Do my numbers now seem better?