I repaired a quilt for a friend, with some trepidation as it was totally hand-sewn and quilted. Three blocks and one square in the border had to be replaced. It was easy to sew a square over the one in the border but the blocks used the same light fabric consistently across the quilt and I didn't want to re-make the whole thing. I had to take the blocks apart, re-make them using the old light squares and sew them into place; not half as easy as it sounds. Also, as perfect as a quilt may look, all quilters fudge a bit to get things to fit and one has to deal with that, as well as the effects of age, shrinkage etc. I used fabric I had which seemed to fit by color, washed it first. I still worry that the new fabric could cause more deterioration but that is happening elsewhere in the quilt anyway. At least it is now usable, my friend was pleased and I enjoyed communicating with my friend's great-grandmother through her quilt.