Like rebuilding a classic car, you have to make the decision pretty early on if you’re going for a genuine original restoration, or something that just looks and functions similar to how it was.
That's very true - mostly I want to just keep the original working as long as possible, such as is the case with the Sony TV (because its such a significant product all things considered) - but in the case of the Red/Black TV I've often thought about just gutting it, using the case and replacing everything inside with an LCD screen/power supply, other peripherals for the Oric Atmos ..
The second is much cheaper.