[pestes]

So, as usual, no zebras.

With HCV adjusted, the front left corner is now at normal travel height.

So really, everyone's original proposal of coach tilt due to the rear HCV was the ultimate answer.

I think there were 2 factors that led me off into the weeds:
1. The broken brass fitting in the rear. That was what led me to try to force the raise solenoids open in the rear and when the front left of the coach still dipped, it made it seem like the front dip couldn't be due to the rear HCV. And, ultimately, I suppose, at that point - it wasn't.
2. The significant difference in the amount of time it was taking for the left side vs the right side to lower in travel mode. I'm not sure I ever waited long enough for things to reach equilibrium in this scenario. When the left dipped too far down to drive on and the right did not, it sure looked like something was wrong in the front, and I would move on to the next test without fully waiting. Ultimately, I suppose, something is still wrong in the front, but I haven't gotten back to investigating the slow response of the right side.

Thanks, as always, for everyone's help. And, as usual, your insights, Richard, have given me a much greater understanding of the systems here. Thank you for all of your thoughts and input.