I do try to only line up block to block and have ripped out a few of the seam and resewn especially the angled blocks to perfect 1/4 inch seams. I also make plexiglass templets which, for me, help getting the pieces exactly cut. I also constuct each row as I go keeping each end seam in line, then sew the rows into one half and then the second. I'm kinda anal about accurately sewing each bloch. My wife and her sisters are all long time quilters so I have a pretty high standard to attain which makes me pay that much more attention and not say to myself thats close enough. I thank all the quilters out there that I have viewed thier work that inspires me to quilt, and all of you who have taken the time to view my work, please feel free to critique as any suggestions always help.