Hi James,
Glad to hear you’re having fun! For the 6DJ8 tubes, I’ll need to check with ours here. I know the original version was fine with all of them. But the revised cathode follower doesn’t play nice with some tubes. I’ll do a quick check tomorrow and see if I can get you a solid answer on how they run.
As for the 9 pin adapter, absolutely! We’ve run the 6CG7, 6GU7, 12BH7, 12AU7, 6AU7, 6N1P, 6N6P, 6BZ7, 6DJ8, 6N23P, and a whole host of other 9 pin dual triodes.
When I get it sorted out, I’ll add another response here.
Cheers,
Charles