I have no problem with waypoints, icons, and trails which I mark on the unit I am using at the time, save them to an SD card and transfer them to the other head.
I have started to record my day's fishing trip on the console unit. Playing it back on the 'puter I have seen several things which I missed during the day. I have isolated some items and gotten the coordinates for waypoints. I have also played the same recording on the unit head and marked waypoints as good stuff has scrolled by.
When I compare the waypoints using the two methods they are quite different for example, one of them gave a W9345.545 with the 'puter while marked on the unit in the garage it was W9348.460. That is quite a difference. Which way do you think is the most accurate?
Also have you used any programs to convert one mfg waypoints to another. I have downloaded GPSBabel and can't get it to run.