Yesterday on my first flight I got the batch of self checking flashes as normal. Them the regular green flashes for GPS mode, followed by the first batch of rapid green flashes setting the course lock. As it returned to the green flashes for GPS there was one single red flash. Them green and them the second batch of rapid green setting the home position. Is it likely this single red was where it briefly detected less than 7 satellites, and them it picked up 7 or more? After that there was no further red flashes and the flight went without incident. But as I am still wary about what "could" happen I note any changes I have not seen before. Also is it unusual to have never "so far" had any yellow IMU warm up lights? The UK is not that warm particulary at this time of the year!