"The technique of paper piecing (sometimes called foundation paper piecing) uses a drawn or printed pattern as a base to stitch on directly, and can help you achieve complicated patchwork with perfect piecing."
Y seams are a complicated patchwork that paper piecing alleviates, for the most part. I took a short class & bought a book which I can't find at the moment. It was tricky for me but turned out alright. I find pinning & checking point joints as I go is easier.
Still need help downloading pictures. HELP
hugs,
dj