The Level 4 course manual instructions are to create a nine-square grid for your floor plan and designate the nine direction based on a compass reading taken from the centre of your house, but nowhere does it explain why to take the compass reading from the centre or what to take a compass reading of from the centre. The lack of detail, examples and explanations is frustrating. All it explains is that if from the centre, your house is SW 2/3 based on taking a compass reading (of I don’t know what) and if the front door is in the Southwest sector (top centre square on the chart in the manual) and the door faces West 1, then you are supposed to overlay the West 1 Stars over the Southwest 2/3 chart. However, there is no information on what to do if the front door is in the east or west sector and doesn’t face Southwest 2/3 when the chart is supposed to be Southwest 2/3 when taking a compass reading (of I don’t know what) from the centre of the house.