There is just one thing that her tutorial does not tell you to do that I think is really important to get a good outcome. When you bring the final corners together on the base, you should use a needle and thread to make a small X through the points to secure them to the base. Then, when you are joining the base blocks you get a nicer join and a neater looking finish when you add your colors and stitch the edges back.
Hope you all can understand what I`m talking about! LOL