Damn fine workI used to do this for a living so, I always did it the old school way with a mortar bed, cement board and a moisture barrier(very important)! If you don’t know let a pro do the base/bed and seal everything good. I always used red guard by custom building products available at Home Depot and put more than one coat until thickness of a dime. Then you can set the tile (YouTube) however you like.View attachment 5826726