I can't resists the idea of building a high-end DAC, so I start building a γ3 now.

I forgot to order the Zeta1 module, I have an Amanero module, intend to use it instead,
about the parts used for Zeta1 module, I should left all of them uninstalled like the picture, is it correct?
The optical has 3.3V and 5V version, I wonder the only difference is the supply voltage? the U8 don't need to be
installed if I choose the 3.3V version, right? It looks like U8 had been installed in your build.