It's very readable at small sizes. Try 8 point.
Edit: even better, grab a METAR from your favorite airport and drop it in at 8 point
Edit: even better, grab a METAR from your favorite airport and drop it in at 8 point
[0] https://www.sciencedirect.com/science/article/pii/S004269891...
But another comment pointed out that B612 might be specifically tested in conditions with vibration and fatigue and other factors like that. I wonder how Atkinson compares?