Yang Jingchao over at camgle posted a project that they have been working on to remove the viewfinder from a Sony a7, which is really impressive. It looks like phase two of this project will include a hot shoe from later posts, so this might be a thread worth following if you’re into extreme camera modification.
Below you can see just a few images of the project, but there are many more in the main thread if you want to dive into the details here.