When I first started, I had the "3x rule" If a point did not match perfectly, I would take it out twice if necessary. I would adjust, manipulate, even redo the piece. If, at my third attempt, it still fell short, it stayed where it was. (My matchy rule was within 1/16 of an inch). Once the quilt was finished and quilted, I was generally not even able to find these points that gave me grief. So I have relaxed my standards a bit. I just don't want anything to jump out at me when all is said and done.
I'm a relaxed utilitarian quilter.