I have made several tshirt quilts, but it has been a few years since I worked on one. I am working on the first of three that I will be making and I am having an issue that I don't recall having before. (maybe I just wasn't paying attention before

)
I have my blocks cut the same size - I have double and tripled checked. But when I am sewing the bottom block seems to "shrink"
the small pieces (4 to 6 inches) I don't really notice. On the bigger pieces the top blocks ends up hanging over by a good amount by time I am done. To combat that I sew half way and then stop and start at the other end
Now I have 3 big long strips for the top ready to sew together and I don't want to mess with that.
Would the walking foot resolve this issue? (at least make it better)