Hi dave saw this and I want to do the same thing for my nan and grandads kitchen floor, my grandad laid it when they moved in (before I was a tiler) and I believe they are a the same tile except for the shape? What I want to know is did you remove any grout from the holes in the travertine? If so how, if not did you just grout over the holes that were filled/part filled with the old grout? I would really like to do this foot them as my grandad knees are not great 😉