I wouls suggest that you try and get a scale that would allow you to see it in a glance. If the range is to high you would need to focus on it to know the boost level.

I wonder if anyone make a digital unit (3/4" by 1 1/2") , that way it would be clean no matter where you put it.

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1980 300TD-T (82 Turbo and Trans) 159,000 Miles "Jackie-O"
1983 300SD 272,000 Miles "Aristotle"
1987 Jeep Wagoneer Limited - keeps the MB's off the ice and out of the snow
1994 BMW 530it