Edit Totals for Garmin Edge 520

I track my biking KMs using a Garmin Edge 520.  Occasionally something goes wrong and I need to edit my total KMs.  Like last night when my battery died mid ride.  I tracked the rest of my ride on my Fenix 5x, but I like to have my KMs for the year in one place, so I know when to make my next 100km picture. So I needed to edit the Totals.fit file that the Edge 520 uses to track totals.

I've written some code that edits the Totals file used by the Garmin Edge 520, and released it on GitHub.  See Fit Totals Editor.

- Peace