on the baby quilts and the doll quilts I check for square, trim if less than 1/8 of an inch (find the problem if more than that) quilt then check for square again, then serge with the blade disengaged, then bind.
when binding as in piecing it is good to use a single,straight needle throat plate...the zig zag plate is just not able to produce a really nice straight stitch.....this is when my SINGER 301A really shines.
do not my BERNINA hear me say this