I was looking at the shower head pipe in your last set of pics and thought, I wonder how many attempts it will take to cut that hole without cracking the tile, it looked so close to the other tile I didn't think it was possible. Thought you might move the pipe further up the wall.
Did you use some kind of diamond tipped hole saw to cut it, it's perfectly round?
I am going to be re doing our onsuite bathroom sometime this year. Got to rip up the tiles, replace the shower, toilet and sink. I am going at least half way up the walls with tiles, more if the money is available.
I have to get a new wet saw, the motor is dying on my old one, the one you have looks great, and expensive lol.