I havnt been so aggressive with the saw as on page 10, I carefully cut out the door with a craft knife leaving 1 mm on the bottom, then reinforcing the coach front by welding a peice of plastic card into the cut aperture to give the body back its regidity, cut grooves in the side of this and the base to thread the LED wires and plate through and re assembled. I didnt lower the headcode as I realised once I had made the cut!!! My headcodes are placed inside the panel, which is correct and not on the outside which looks awful, but with what I've done I can live with it and have learned from my initial mistake.