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I guess my question is about this kind of meter is what keeps the ball moving between the "out" to the "in" ? to get back into the start place again.
And if it is a steel ball the angle of the vehicle could throw off the readings, because there can't be a real seal between the ball and the wall. so you will get some flow around and if the angle increases or decreases that would I'm guessing cause differing readouts.
You had experence with one of these years ago how good did it work for you?
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