Agree with nativetexan...it's the nature of PP. You could try printing
an extra copy of the pattern...colour it...cut it up...then place it on
your fabric (right side of fabric should be up). Give yourself a good
half inch allowance. I still get a bit more waste that traditional piecing
but that's the way it is. With practice you might be able to reduce
the seam allowance...on squares and rectangles. Triangles not so much.
Hope this helps.