> mass + spring mounted to a linear POT
> poor mans acceleromiter

That's something to think about. What you need is a variable that's
more durable than a pot

There's a limit to how far the vehicle will be leaned over when parked,
but it could be maybe 30-40 degrees. Possibly a dual pendulum approach.
The whole unit is mounted loosely above its COG in a two axes gimbal,
so it would be self-levelling. The actual sensor is inside the levelled unit

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