Personally my favourite is Nabeghlavi. I'm assuming that you're in North America based on your current choice, in which case I checked and you're in luck they do actually distribute to the US and Canada so you might want to look out for it but I imagine that as it's imported it would be a bit pricey.
If you commit the file on the secondary drive then it will be in the same repository as the rest of the code so you will end up with a large tree in that repo or you will need to move it over with the rest of the files. Why not make a symlink on the secondary drive pointing to the config in the repository? This way you can track it in git and have it located on the secondary.
Thank you for reigniting my memory of this.