I'm thinking I'd like to have the switchplate cover for nearest the shower be made of the same tile the wall is--can anyone help me with figuring out how to cut a rectangle out of it? The edges would really show, so I can't do anything just rough-it would have to be beautiful...the holes for the screws would just be with a diamond bit, so I don't anticipate any problems there (maybe with the countersinking part...but I know there are bits for that, too) but how would I go about making a toggle-switch hole?

Thanks in advance for any help on this.