1) take all those seams out (sucks)or 2) square up your blocks prior to stitching them together even if it means all of them are now 6 1/4 or some inbetween number.. and 3) everyone posts here a scant 1/4 inch which means pull back 1/8th in inch or so using my machine and whola! yesterday using this sage advice my block ended up exactly like I was hoping it would.