Simple High Voltage Regulator

Thank you for the sharing, iTiberius, Jan Didden, v4lve lover! Thinking using your designs in PS for my SET tube amps. Seems like skipping the choke after rectification is ok too (but increase capacitance values to 150uF or more). Also, I'm using zener diodes to lift the regulation section to a precise voltage instead of using R4, should be fine too, right?
1700857589789.png