This block was a bit of a pain for me. I should have followed my first instincts, but oh well. You can learn from my mistakes! :)
The line diagram in my book was a little off. I figured I could fudge the measurements... That might have worked if I was more consistent in where I took the measurements. Eventually I ended up re-drawing this block and making sure things lined up. After that, it was a dream.
Here is everything laid out and ready to go. The little pile to the side are the flying geese.
Here's our next step with the centre 9-patch completed. The flying geese in place and the outer triangles attached to the white strip. I realize that the white strip will be a point in the final block but I find it easier to cut a longer rectangle and then trim things down when the block is all sewn together.