I have just bought a Garmin etrex device from ebay, along with all the necessary cables and attachments for putting it on my bike. I intend to fill in the gaps in the map for the mid Devon area and Exeter. I live in Thorverton, right in the middle of mid Devon, and I work on the outskirts of Exeter, so I'm just working my home territory.

I had some trouble working out how to get the tracks off my Garmin etrex at first, but finally got the settings correct on the device ("Garmin" only), and used the correct format for saving the file with gpsbabel. Now it is easy!

I discovered the same thing everyone seems to with these devices, that if you save a track on the device then detail is lost, so my first few tracks that I made and saved before downloaded to my PC were useless.

I'm not sure at the moment how to upload waypoints to OSM. I've been storing locations of Post Boxes and Churches as waypoints, and I'd like to include them in my mapping.