Had morter underneath about an inch thick. Knocked the tile up and then went back and knocked the morter up left the floor smooth as silk. Whoever puts the floor in will have it easy for a change. Gotta look out for each other especially in this trade.
Doesn't look terribly efficient, and you know, they do make pillows that strap to your knees so that you don't have to keep sliding that pillow around...they're called knee pads.