My second comment on this subject: As my personal preference and because of my low boredom threshold, I do not construct all my quilt blocks first and then put them together. In the past, when I've sewn all the blocks first, I've gotten some nasty seam allowance surprises when it was time to attach the blocks and rows to each other. Now, I mostly do 1 row at a time and can see immediately where I need to open my seam allowances so I don't have bumps, lumps or distortions and can also see where it's more feasible to press them to one side. Since I'm a bit challenged in the physical coordination area, I've done a lot of fun experimenting with all things quilty. I'm sort of a "make my own rules as I go" person.