Finally got the correct tool to replace the oil pressure sensor, since I had the deal where occasionally when I came to a hard stop the pressure would fall to zero, which is a problem I've had since the day I bought it. Common guidance on that was that the sensor is known to go bad, although I'm not sure it was 100% of the problem. In the last week, it went to zero a bunch on the trails, and it seemed like it was more prone to do it when pointing steep downhill. I've never been fully convinced it was the sensor, but the motor never gave any signs of trouble, so I back burnered it.
Since replacing it, there have been a couple times where I started it up and the gauge read zero until I gave it a little gas, then it was fine. Although I have not had a re-appearance of it dropping to zero after a hard stop, so I may have solved that particular issue. Assuming that the new sensor is reading correctly, I'm guessing my pump is suspect, like it may be losing prime while stopped? Although when I just started it up after sitting overnight, it went right to 40 w/o any driver input. I'm at 190k miles, and was planning to do the RMS in the next few weeks; added a Melling pump to the order. I don't like just throwing parts at it, but it feels prudent in this case.