LOL You are a much braver man than I am LewisM.
When I take anything apart that is complicated I use my cheap point and shoot camera to take images at every step. It is an essential part of my tool box now.
I stopped relying on my memory years ago after making some dreadful stuff-ups - too many left over bits and pieces etc. This simple precaution has saved my bacon on many occasions. I give thanks regularly for the development of cheap digital photography.