Isolate battery, remove black lower dash cowl then three dash screws, drop steering wheel position and all should be obvious John. As you suggest take photo's though.

I don't think it's practical to remove one instrument/switch at a time to swap so it will involve unplugging all connections to dash (marking each on loom). The heater control bowden cable has a kink in it which needs to be unhooked.

You can then remove dash onto bench and start swapping components over before simply plugging loom connectors back in and re-hooking heater control cable. The extensive photo's you have taken will show cable runs. What could possibly go wrong innocent

Pic here taken outside KH of 3.7 Roadster with dash removed.

[Linked Image]

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone