I have made a stained glass quilt with many blocks. While attempting to add sashing to each block, I discovered there is too much fabric showing around the blocks which are supposed to be 14 1/2"unfinished. I can trim each block to 14" without sacrificing the integrity of each block. Now for the dumb question. There are also borders at the top and side of each block. Should I trim them by 1/2" on both the inside and outside as well as the top and bottom to make a perfect fit? Thanks for any help.