I have uploaded two PDF documents explaining how to set up BOTH your GPS and Your computer to properly use basecamp to both make and transfer routes to your PC...
In the first documents it explains how important it is to have your GPS set properly in order to have it make the proper calculations once you load a custom route as we use for the NS450.
The files are available in the documents section of the Members Only drop down menu... YOU MUST BE SIGNED IN TO VIEW OR DOWNLOAD THEM!
Garmin Basecamp Tutorial Part One