I've wanted to ask this question for weeks but wanted to see if I could figure it out myself. I can't, so here's the question. I'm making a quilting using blocks from a QOD (http://www.quiltpro.com/botd/botdArchive.php). The pieced blocks range in sizes from 5" to 7". I intend to use a very limited color scheme (black, white, gray, and red). But I want to start some of the prep work like making HST's. With such a difference in size how big should I make my standard HST? And what about sashing or bordering the blocks so they are all one size at the end, necessary or not? Any tips would be gratefully appreciated.