How long does it take you to stitch those? Do you then immediately stitch the pieces together? They line up so nicely.
Takes me about an hour... but that is probably because i a bit of a perfectionist ;-) sometimes i stitch them together right away. Sometimes i just wait until there is time ... you can see more here: http://www.flickr.com/groups/wildolive/pool/
Your stitching is superb!