Very cool! The missing valve is the GZ34 rectifier - easy to get and the JJs are probably the best new production. I'd probably change the power valves and phase inverter as a matter of course (the power valves look to be different brands anyway).
Coincidentally I was playing Mojo JoJoe's more modern
Super (Pro Tube series) the other day, which he's considering selling. GREAT amp - very flexible with channel selection and a gain boost on tap from the footswitch. Alnico 10" speakers and a S/S rectifier like a Twin (which I like 'cos it's punchier).