I sew with about 1 1/4"-1 1/2" seam and clip and rip. Because the selvage is along the length of grain, which has no give like cross grain or bias grain, it will always rip straight. Another thing i do is cut the fabric in half WOF then sew the two big pieces together along the selvages. rip off the selvages and clip one of the big pieces along the length of grain then rip that too. Backs just go so quickly if you just grit your teeth and rip
. Good luck!