If I'm doing QAYG for block quilts I like to do it in thirds: do stitch a third of your blocks together and then sandwich and quilt but leave about a 1-2 inch open part on the bottom, don't quilt all the way to the edges. (I prefer horizontal but you can do vertical thirds too.). The middle section you sandwich and quilt but be sure to leave the 1-2 inch part on BOTH sides, then leave the open part on the top for the last third. Then I stitch them right sides together doing the front, then the batting, then trim the batting so it's not too ragged then do the last bit. That last seam is tricky, I can usually get it lined up with the blocks so it doesn't show much but if I miss a titch it's ok. I've also done the QAYG where you do the full top and backing but you only put a third of the batting in at a time, from the middle outward. Much easier to "puddle" cause less bulk