You have many options. If you just add a border to it, no matter which side you look from, the quilt is always straight. I vote for that. On another idea, if you cut each block and add a border to make them all the sale size, your borders will not be all the same size, but if you cut them again a little smaller but arranged in different angles, it wouldn't matter. You can then make them all face the same direction. Was that one as clear as mud?