Ok,admit that PSU is not so complicated,but You have to try to realize this interesting Circlotron Variation circuit in Praxis,Spice is only Spice- only good for Virtual probes and Circuit analysis, and `Spice` usualy dont Lie, but for final Amps Sonic judgement only merit well be jugde of Your(Listener) Ears.
BTW The best way for Circlotron OPT arangement is so called `Split bobbin coil` OPT.Any way, any Tube Amp OPT is allways part of Sonic degradation.
But with Circlotron PP based output stage,OPT is litle less Critical than in other Tube Amps topology and sonic degradation is less,but not totally removed.
Best Regards SS
