This project was originally just going to be ...
...Beats the carp out of...
None of my business, but I didn't see any taping on the cement board... Did I miss it?
Good point, but shouldn't be a problem on vertical surfaces if the grout is dressed and sealed properly...
As I understand it, taping the seams under tile isn't so much to create a waterproof seam as it is to join the two pieces of backer, yielding a joint less likely to flex if leaned upon. If it flexes, grout can break and then the whole trouble with water can begin. The seams shown above are pretty high on the wall, so shouldn't be much trouble.
Lookin' good!
What door is that?
. <G>