Harrison SM5 monitor console schematics

Hi all, its my first post!

I have recently been commissioned to install a pair of Harrison SM5
consoles (branded as showco sm5) as a front-end for a tools HD setup .
Does anyone have schematics and block diagrams for these boards? The
studio owners only want to use the pre's, eq and faders, but they want
to convert the input master fader to an output master fader. Does this
sound feasable?

TIA chris.