Another question do you square all your smaller pieces before putting them together? For instance so far all the blocks I've made have been made of 9 different squares. Then i sew the top row together middle row bottom row then sew them all together. Should I be squaring every step of the way? Look at the block below its clearly not square but if I square it it's too small so i put it in the block as is then the end block was way out of square and I had to trim it down to 12x12 1/4. Here is the finished block after squaring.
definately not square
square but a little small