Being a smarty I wanted to say none because I am not very fond of paper piecing. It has always been very hard for me. Apparently there is a newer method where you fold back at the seam so you don't tear off the paper. Does anyone know if this was in a book or was a tutorial? I have tried stitching the block out through a pile of paper with out thread so the paper comes off more easily instead of using a copier to make your patterns.