It is amazing how hard it is to get really good quality fabric. More than 40 years ago my home ecnomics teacher warned us that fabric was often distorted in the process of it being rolled on the bolt at the factory. I have always been one who tears my fabric to make sure it is truly straight. I worked for more than a year for a business that did custom dressmaking and alterations. In the garmet industry true grain is very important. I learned the hard way that it also makes a big difference in quilt making. When I have to piece I make sure the fabric is always on the grain or the results will not be pretty.