A diamond hole saw bit will be your best friend for this. They are a little expensive but the best way to avoid cracking the tile. I would recommend have a second pair of hands available with a spray bottle of some sort of liquid to spray the tile and keep everything cool, also to help avoid breaking the tile (alluding to Geoffrey's post about making a pool or bath).

Laticrete SpectraLOCK can be used with 1/16" grout joints. Here is a link that might be useful: SpectraLOCK Pro Grout

Sue, I hear 'ya, but you know what?...very little in life is ever perfect. If everything is near perfect, that is more than what most folks get who have new builds done. I worked a high profile job for a famous tennis player and his Broadway actress wife...and you would think that their contracted work would have been perfect, but it wasn't even near perfect in my estimation...except for my work, of course! ;-) Sorry your job isn't perfect. I do feel your frustration, as I am somewhat of a perfectionist also. But, I have learned over the years that small annoyances and disappointments, such as this, soon diminish with time and become inconsequential. Good luck with your new house.

To get a shiny floor, you need to purchase a shiny tile. I'm sorry to say but you have a 'matte finish' tile. The only way to get away from the matte is to rip it up and put in a shiny tile. Right now, matte finish is ALL THE RAGE...which means it is SUPER hard to find something that has a bit of gloss to it. Which it sounds like this is where you are. And then to add insult to injury, you probably found out (the hard way) that you are someone who likes to see a bit of shine in their floors. Totally normal. Most people feel a bit better when they see a bit of shine. It tells them the floors are clean. Because they feel that clean is shiny and shiny is clean. Again this is totally normal. Sadly, you probably found this out (about yourself) once the floor was already installed. The glaze guard is probably a form of epoxy (reading the mixing statement). It will probably give you a few years before it has to be redone. And then the fun begins when you discover you have to STRIP the old stuff before you put on new stuff. Whew. Lots of work but if you must have some shine, then this is your best bet.