Thanks in no particular order to:

• SylverRez

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  Modchip Github Repository

  

• Will's Console Mods

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  Modchip Showcase

  

• Atheris Mods

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  PCB/Soldering help and documentation

  

• Modzville USA

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  Modchip Installs

  

• PS2 Versions (unofficial)

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  This link will help you define what revision PS2 you have to cross reference with the install diagrams.