OK, thanks for that!
Meantime, Allied Electronics dropped off an early Christmas present today for the '4. Plenty of new caps, the new horizontal centering pot (2-watt wire wound), various 'lytics and so forth.
Still on the way is a pair of 6CB5A's, a pair of 6AU4GTA's, a 6AQ5 and a 3A3 rectifier. Those are coming from Antique Electronics Supply, should be here Friday or Saturday.