since Fenix is a watch for hikers and the map sourse that is suitable for Garmin Fenix is very limated . … i hope that there will be a type of osm map that is suitable for Garmin Fenix will be develop 
Have you tried these maps, they are designed for the Fenix: http://www.gmaptool.eu/en/content/maps-garmin-fenix
how can i get the .exe file for the map that i want ? i dowloaded the map , but don’t know how to install it into my Fenix by MapSourse… help me pls… 