Modern screens are daylight visible and self adjusting to ambient lighting or you can use time of day to change the gamma settings. Things have come a long way since I was looking at this even a few years back. With solid state drives also now becoming affordable and screen technology having advanced its much easier. You could even slap a small tablet PC into the dash and take it away with you. That would run all the tuning software and anythign else you wanted it to do
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