We have found it far easier and simpler to load routes onto devices using myrouteapp (www.myrouteapp.com/go). This method provides every user with as close to ass possible , the route the route the tour guide will be using. In order to do this, please go to: www.myrouteapp.com/go and enter the code MBTOURS
Once you have done this you can watch the video on how to install the routes. Please note: in the video it advises to use the relevant format for your device when sending the routes to your sat nav, please ignore this and use Garmin gpx 1.0 format so that it retains the waypoints. All other formats appear to omit the waypoints causing discrepancies.
We only provide the routes for guidance and cannot, due to so many factors involved, guarantee your device will follow the route as per the tour guide. Our advice is to focus on the drop off system, enjoy the ride and use the sat nav as a backup only.