Ok, well I attempted most if not all of the posted ideas. I cannot be bothered to build outside of the case at the moment,as I barely know what I'm doing as it is. As I said, everything looks to be in the right place and connected properly, as once you know where it goes it seems obvious. I will upload some pictures of as much of the set up as I can.
Stulid, if I'm completely honest, as much as I appreciate your help ever since I started this thread, I'm not sure I like the idea of someone I don't know at all coming to my house to try and fix a £750 computer.