I reached out to Garnet to understand which kit I would need to utilize the NMEA2k capabilities of the Cerbo GX. They told me to look at this version: 709-N2K NLP and they would sell it to me directly. I want the Cerbo GX/Touch 50 to be able to monitor the tank levels using this system. I want fresh, black, grey and propane monitored. How does this need to be setup so I can use the Cerbo GX/Touch 50 to display the information vs the display that Garnet has that comes with the kit?