I just took the spacers out and must say I am NOT happy with the results. Unfortunately there is no redoing this. I/we will just need to live with it. The main issue is the leveling or levelness from tile to tile. The 1/6 spacer is not as forgiving as the 1/4 in spcaer.
I will try to make it better on the rest of the floor, but the marble does not allow a rubber mallet to be smacked on it to help level it. The mallet would cause breakage as the marble has natural cracks in it.

🙁
🙁