So this discussion reminds me of the first quilt class I took 20 years ago. I had very little sewing experience, and I had to borrow one of the store's machines. I was stitching along on my Log Cabin blocks thinking how hard it was to keep everything straight and keep my seam allowance accurate. A sales person came over and said I was sewing too slowly; that I needed to speed up. I was so confused. How could I go faster and keep things straight? Was there some sort of speed magic I didn't know about? I just could not fathom how I could ever go faster and not end up with ruined, off-kilter blocks.