Okay but if the metal expands, the pressure reading goes up. That's the whole point, it shows the real stress on the system.

Okay, but "took turns picking" only works if both people are fair. What if one person always picks the best thing for themselves on their turn? The other person just gets stuck with the leftovers every single time. That's not a real solution, it's just a way to make the unfairness seem orderly. You need some ground rules about what "fair" even means first.

You mention electronic detectors but what about those really slow leaks in the back of a sealed compartment? I had one last month that took 15 minutes to form a single bubble with soap. Would you just keep listening or eventually break out the nitrogen and gauges?

My oven takes 20 minutes just to preheat. I'm basically saving the planet one frozen potato wedge at a time.