Hello,
Sorry for the bump but can you guys give more information on stitching up two fit files using a text editor? Is there a step by step procedure anywhere?
You can't.
FIT files are not text files like GPX.
Methods you can use:
1) Connect the device to a PC running BaseCamp, have it display the tracks, and splice them there ( as described above ).
You don't need to interact with the FIT files directly.
BaseCamp will just show them as tracks.
Once they are spliced, you can export the spliced track or whatever.
2) Upload the FIT files to a web service ( eg Garmin Connect, or many others ) that can export them as GPX, then splice the GPXs in a text editor. Seems a bunch of work to me.
3) Use a tool that can natively splice FIT files, eg 'FIT File Repair Tool'.