I've just done a reverse modding for a new pc I built for my parents! This involved replacing the LED fans that came with a case and disabling a dummy fan that spun and look pretty. They wanted a pc that sat there without looking like a christmas tree!!!
Atlhough technically I did add a custom component to it, with a 5.25" dirve bay fitted multicard reader to make getting their cameras pics off much easier. Okay, internally I suppose I should talk about the near silent Arctic Freezer HSF and the full copper Zalman flower fan (on low voltage quiet setting) on their new graphics card! "Hush!" I said, and it did