had a broken 10 inch tile that i cut out
but was able to keep the grout intact all around
but can't drop the new one in, wider at the base than the top
so what i want to do is shave the grout back
so i can drop the new tile in on top of the quickset
and then remix just a min amount of new grout with
some of the old so that the color variation is minimized
so? what do i use as a file/shaver?
brick, cement block, steel rasp?