I ended up going and getting a new grinder due to the batteries going dead so quick. I was able to get all the tiles ground down in about an hour. I must say the vibration on this grinder is unbelievable.
I could have done this days ago if I would not have planned to go to the farm and get the battery operated one.
I guess it was for the better. I got another tool and put up a room of shelves. 🙂
Now to get the tiles put in place to start drying.