Just found my 'Halo Edition' Xbox in the loft, Xecuter 3 chip, Xecuter LCD front panel, 160GB HDD. Fired it up and is working so just updating things for now until I can upgrade the HDD/ribbon cable to load in lots more, clock cap removed but luckily no damage!
I also found a black Xbox with an Xecuter 2 chip that I did around the same time! (Must have been 2003/4?)
Can't believe how much the X3's control panel versions are going for on the bay!