EUREKA!
I never thought to try only editing the gcode file inside of the archived package.
Using 7-Zip (Windows)
Navigate to the Metadata folder and right click on the .gcode file. Select “Edit” and it will open the file in a text editor.
Make your gcode edit and close the file. It will ask you if you want to save the changes. Click “Save”
7-Zip will ask if you want to update the archive. Select “OK”
That’s it.
You can open the .gcode.3mf file in Bambu Studio to preview your changes.
As you can see here I simply added an additional move on X on the second layer.
