My last attempt at pp was starting out fine, and all I was concerned about was making sure I cut the next piece big enough to cover the next space. I couldn't understand why when I was doing that, and then sew it that when I bent it over it didn't cover all of it I finally figured out, because I didn't like it up with the precious edge correctly. That is the only way I know how to explain it. Once I got that straightened out, and before sewing it, flipped it over to make sure, I was ok. Then I had fun.
I used my seam ripper several times, but it was worth it.