That is good news indeed. I was just about to reply and apologise for the unclear instructions regarding the output transformer secondary. Pin 3 on the tube sockets related only to the primary. The crucial thing that I forgot to mention was the fact that the hiwatt output jacks are wired to short the secondary winding if there's no speaker plug connected (safer for transformer and tubes in the event the amp is operated without a load).
Very pleased to hear you got it going again and hope there's nothing major wrong with the other one.