So I finally got to pulling down the pink granite on this pia fireplace, got the tile up, and now want to float the mantle. Its a 30-40 lb slab of Maple. You can see the brackets holding it up looks meh, so I'd like them to disappear. I'm thinking sink the wall side bracket into the sheetrock, then patch and paint, and stab what is now the under bracket, into the slab. The opening in the slab to accept the bracket, needs to be super accurate in both directions in order to be level in both directions. I dont have a drill press. Am I missing a simple solution?
