python-fitparse VS garmin-opentopo

I've found the issue: https://github.com/GoldenCheetah/GoldenCheetah/issues/3645 and https://github.com/dtcooper/python-fitparse/pull/116

I wish there were a way to do this from the app but I don't know of one either. Theoretically you could download the .fit file, modify it manually, and reupload the activity, but that's work. There's a Python .fit library if you're so inclined.

GPS files are easily faked. Source: I've written a library to parse them.

I found https://github.com/dtcooper/python-fitparse and it parses Garmin's files well, but it can't save.

For my purposes I wanted an extremely stripped down style file. You can see other examples of styles here: https://github.com/8cH9azbsFifZ/garmin-opentopo/tree/master/lib/fzk-mde-garmin-develop/Freizeitkarte-Entwicklung/style (in the example above you would have a folder called your_style instead of fzk). I'm not sure how the file naming works, but for my purposes I have a info, lines, options, points, polygons, and relations file (no file extensions). The points and relations files are completely blank, since I don't care about routing or landmarks. My style will render easy runs green (line type 0x01) intermediate as blue (line type 0x02), etc. Anything that is a night run will have a yellow line rendered behind it, and the chair lifts are rendered in red. Look at the TYP file to see how I made 0x01 a green line.