[Amps] 4CX5000/10000 Screen power supply help needed

[Hsu]

Happy newyear to everybody!
  I have no experience on building over 2kW amplifier.I'll try this project 
this year.
I just get a brand new socket and will oredr some parts after new year.
  I  think the  regulated screen supply to mess with  too.
I study   DC9DZ 4CX10000D amplifier project,
DC9DZ use  expensive high power and rare  zener diode in serial as screen 
shunt regulator power supply ,
but I think  it is expensive and poor dynamic spec and bad IM3.
I  think the screen power supply based on G3SEK's design is the best, but as 
4CX10000D and 4CX5000's sceeen
PS  is difficult , too much power and too high voltage , even parallel and 
serial over 10 MOSFETs. Any suggestion?

    73!Hsu