All I'll say is that a friend sent me a Sophia PP EL34 amp that had been "modified" for 6L6's. It was butchered, so badly that Richard at Sophia said it was impossible to restore to the original condition. I stripped it and used it for an experimenter chassis.
Did your friend buy it direct from Vital or second-hand? It's worth asking.
Did your friend buy it direct from Vital or second-hand? It's worth asking.