I am in the process of installing tile in a new shower.  I was thinking of using 12″ x 12″ (cut on diagonal, 2 out) 1/2″ thick corain as shelves set into one of the corners. I was going to notch the tile to except the shelf. We have matching corian in the bathroom.  Does this sound like a workable solution?  If so what is the best way to attach the corian?   Thanks for any suggestions!