Not to nit pick, but since you repeatedly point out that you're using the recommendation of tire mfrs websites................
From the 2 links you posted above:
If you're running 45 and max on the tire is 55 then that's probably not unsafe but it's certainly higher than recommended by Ford. And it's not necessarily the best pressure, either, regardless of what your tire ninjas say.
And yes - attitude is everything when you're looking for advice.