After doing what felt like ten thousand half square triangles in my avatar quilt, I too have since started lining up intersections and only stitching afew stitches to make sure its aligned. Every so often I get bold and think: okay the last 40 were perfect, I stitch the whole block, and lo and behold, I tearout the entire seam, so now every seam that requires it, gets the 4-5 stitch alignment check.