Although it would be easier to just follow Sue's instructions for HSTs, I'm using flying geese where possible. With flying geese, you have fewer seams, so you will save fabric and will have less breaks in your fabric designs.
I made a lot of extra HSTs and am considering using them in my September border stars. If I do, then I'll have to take some creative license with these blocks. So far, I have pretty much been following Sue's pattern with the exception of substituting flying geese for some of the HSTs. However, I really like some of the creative spins other have made to this pattern and wonder why I didn't think of it. After watching Sue's September instructional video, I think she enjoys seeing those creative spins on her pattern too.