I use the fold back method of PP because I don't like tearing off the paper, When folded back, one can place the fabric behind the fold back and look through it to make sure the fabric will cover. I don't pre-cut any chunks. I work with scraps and just cut off the piece after it is sewn on. i often cut many pieces off the same scrap. I'm not sure if I explained this well, but there is very little fabric waste this way. And I use the same paper pattern several times before it wears out.