Out in a friends boat over the weekend and notice a neat idea on his dash. He has a cigarette plug voltmeter / 3.0 USB dual charge port. Has anyone one else looked into trying this or is in a dead end. It bugs me to no end not to have an oil pressure gauge or voltmeter on my Dakota. I don't like the idea of adding gauges under the dash or on top of it, this seemed like a neat idea with little effort to do. This would solve one item at least, without putting extra holes in the dash my truck is a 2011 4x4 4.7 Big Horn,