Thanks for the test sample
I'm more of a mountain biking guy, but I also enjoy doing some walkings through the forest and mountain from time to time, so maybe I will have a chance to test it "on field".
I just have a doubt: does it work also as a track logger or is only for navigation purposes?
I should be able to adapt the SportTracks plugin to work with the GH-561 too, it should not differ much.
By the way, is there already any protocol specification available?