Thx for the kind words, was nice to speak with you.
In pic #70407, sure looks like you installed the underlayment at a 90 degree to the subfloor. That is the subfloor, right? If so, next time install all plywood or OSB in the same direction as the subfloor, which mean perpendicular to the joists.
In pic #63542, I don't see any thinset mortar under the CBU. What happened with that?
The end results looks very nice.
TILE GUY - retired- TROY, MI - Method & Product suitability consulting.