My last class showed us the difference between the scant and the regular. Some patterns say to use a scant 1/4" also. If you take that little bit left from the scant 1/4" on one seam adn do it on all sides, it makes up to a big difference in block sizes. There really is a reason for scant. Now how can I adjust my machine? I order a ruler type thingie form her shop which when placed on your machine, you put the needle down in the 1/4" scant and can put blue tape down so you can use it as a line to follow. Then it has 4-6 other holes for making precise seams. When I get it I will post what and where you can find one. Thanks for this post. YOu have all helped.