Hi, this looks quite qood. Since you are working at a very southern part of the map, with a lot of projection distortion, I would advise you to compare your work with some images (i.e. Google Maps satellite) to check if all the details are included correctly.I made a patch for the Falkland Islands and the tip of Tierra del Fuego.
This is the very first time I make a contribution in these type of projects, did I do a good job?
Here is an update on your patch, which also includes a few more little islands and lakes.
Are you planning to contribute more to the map? Which areas do you have in mind?