Jan, I never doubted you knew, and the M00
was funny.
All through my PPL my tracks all looked a little like that one. After a practice skills test, no less, my FI was pressed for time and flew back while de-briefing me. Looking at his track afterwards, it was a straight line. Until then, I had simply never imagined that could be possible, and my DI scan was, ahem, episodic.
Fortunately, it was just in time for the test.
Apologies, this is even more off-topic.