When it comes to guages I subscribe to the advice of ole Ronnie Reagan - 'Trust, but verify'. Even if my good floor pump says I got 80lbs in the tire, I still use my hand to test the firmness. This is especially needed with presta valves - I can't count how many people I have watched 'think' they pumped up to 100lbs or so on just two strokes because valve wasn't actually engaged with the pump.
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"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey