I have determined that my Model 3, as manufactured, is not CCS upgrade enabled. However i read in this forum that folks are doing it on their own. I would never try to do it myself and have drawn a blank on Tesla dealers that will do it. I am about to take a round the US tour in my 2020 Model 3 and would like to have the CCS upgrade performed on my car anywhere along the way. Does anyone know where a Tesla dealer or 3rd party shop would do it?