I have B+ out the wazoo, 407 volts, where about 300 volts would be better for the Harvard build. I also have a stack of various 5 watt ceramic sand block resistors, most between 200 and 500 ohms. Is there any reason why I should not put a big resistor between the rectifier and node 1? And if that is a reasonable move, what is the calculation for dropping DC from 400 to 300 volts? Thanks in advance for sharing your wisdom.