If you can't organize your waypoints with your software on your original system or the software on whatever you are converting to GPX on. Then download HBPC from the humminbird site then organize them there. Your Solix units handle GPX formats with the exception of the ICONs. However it will be easier to delete duplicates in HBPC then transfer GPX to the Solix's. At this time Solix has proprietary icons and they will all have the icon you select as default in your solix units. Chart select is mapping. The waypoints are in the fish finder's memory. Mapping is a separate item. I am not the local expert but your question has been here for a time and thought I might get you started. Bob
This is he link to the fishsmart/chart select manual in case you did not have it.
https://www.humminbird.com/sites/hum...app_manual.pdf