Have you installed any additional USB ports for charging devices in your Spark? I have a 2015 Spark 1LT manual and have been thinking about putting in a couple dash-mounted USB ports. I found a few aftermarket backlit USB ports available online; obviously the install would require some dash/panel modification and running wire either to a spare fuse block or directly to the battery. Was thinking they could be mounted on either side of the factory USB/aux ports on the little panel below the A/C controls. My GPS occupies the 12v lighter outlet, and my wife likes to plug her iPhone into the factor