Not bad - Kai’s spreasheet predicted a pH of 5.6. Colorphast strip read 5.3 (Kai’s experiment showed these strips tend to read 0.3 too low, so if I was only using the strips I would have called it 5.6).
If you standardize to measuring your wort pH at room-temperature, then automatic temperature compensation becomes much less of an issue. Brewers should not place their pH probe in the mash since it shortens the life of the probe.
Is that due to the temp, or something else? If the temp, then I presume that you then recommend taking a mash sample and cooling it to get a reading? Or maybe the shortened life is due to the particulates? In which case cooling is unnecessary? Or is it something else?
Its just the thermal thing that shortens the life of the very thin glass bulb. Going from your room-temperature to the mash temperature several times, places a lot of thermal stress on that bulb. If you’re a heat lover and run your room temperature around the 150F range, then it should be no problem to measure the pH directly in the mash. For anyone else, cooling the wort sample to a more reasonable room temperature is going to stress the bulb less.