First is the choice of screen grid resistors, I'll likely go with 1k 5 watt resistors as on most original amps though there are some with 470r, was there a reason for that or just random or aftermarket replacement?
Also originals use one 1.5k control grid stoppers for each pair of output tubes, is this usually sufficient reducing oscillations or better to use one resistor per tube?
Thanks & Happy Holidays

David