Originally Posted by PaperPrincess
You can make the long piece go either way. Here is a tutorial on how to align sashing without cornerstones:
http://www.quiltingboard.com/t-43921-1.htm
Having done it both ways, I find it lots easier to use cornerstones! Makes aligning a snap!
I agree -- sashing with cornerstones makes life much easier (less unkind words) although using Eleanor Burns marking trick it is easier to keep things straight.