One of the earliest quilts I made is my husband's log cabin. I made it on my old machine and it just isn't possible to get a nice quarter inch seam or even a very straight quarter inch seam on that machine. So, when I got all the blocks done I discovered they were crooked as all get out. So, I slapped that big ol' square ruler on them and made them square. Some of the blocks have outside logs that are really skinny on one end and fat on the other. Unless I point it out to you you can't tell. I actually have to look pretty hard to find the worst ones. One of the pieces of wrong side out fabric completely disappeared too. I can find the other piece because it's a block center.