Originally Posted by Twohondas
Dave I am not sure the Zumo recalculates the route when you load it from Mapsource. Maybe if you have different maps sets. Have not experienced the recalc issue on loading routes.
Zumo probably doesn't, it's the 60, 76 (and maybe the eTrex?) units that do.
Somehow the others take the route exactly as done in Mapsource. With a 60/76 only the waypoints/via points transfer and the unit will calculate the route itself based on your preferences. Key is to add enough via points to force the unit to duplicate your intended route.