Also, regarding the transformers, they're sealed units, with no markings. I'll keep the mains transformer, for convenience sake, and since it seems well made (it's a very heavy unit). I'm guessing the second, smaller grey lump is a choke, since there's a voltage drop across it. I doubt the output transformer will be of much use to me, without knowing the specs.
Aside from that, there are some pretty cool parts. I'm particularly taken with the giant 1524pF cap, at +/- 1%. That's some pretty heavy-duty accuracy!
Finally, I should mention that the super-sized dial lights up - a feature I'll definitely be keeping
Edit: It just occurs to me now, I've been thinking for a while of a kind of two-in-one amp, with a low watt, single-ended stage and a higher watt push-pull amp in the same box.
The current layout of EF86-EL84-ECC83-EL84-EL84 lends itself nicely to a preamp-output/preamp-phase inverter-output topology - in my head at least - with the single EF86 acting as preamp for two seperate output stages.
I'm thinking it works well on paper, but would present no small number of practical headaches...