Just as little update on this - if you have watched the video you will know it arrived with a broken power switch due to the packaging - that turned out not to be a problem as I showed in the video.
8bits4ever have proactively reached out to me on this build. They are doing everything they can to fix the power button and have also provided build instructions ( I include the link in the video description ) that I've just updated.
They did say that the instructions were in the shipping confirmation - I don't recally seeing the email so would not have seen those. However they have taken the feedback onboard and are also looking to include a link for those in the package.
I can't redo the whole video - but at the end it got a high rating anyway. If the video was to be redone - they would also now get 10/10 for customer service. Such a delightful response from an independant company.