Just to show that I do the experiments and not just talk about them, I have just measured the direction where the Sun rose. It was 98o, which was 8 degrees South of what I expected. The difference between magnetic and true North for my location (4oN, 75oW) is about 5oW, and the time of the measurement (7:40 am) gives us a small error (about 1o). Also, the date when the measurement was done gives us another small error (about 2o), and the quality of the compass used gives us an additional 5o of error, giving us about 10o of expected maximum error.
By contrast, the measurement, for my location, should have been about 45o (that is a NE direction) for the Flat Earth model (as much as it is defined) to be validated.