I just called the guy that vances use's (pete) and he basically told me that he would lay the safe down with the top facing the bottom of the first plane of stairs, then once its on that landing flip it up and rotate it and slide it down the second set of stairs that way it lands on the bottom. He said I shouldnt worry about the stairs breaking it was just getting it turned around the second time because he only has 1 other guy with him. But im not cared about that I have 5-6 lifters that are going to help me.
This just reasured myself that I should be fine. I have a lot of extra carpet from when we re-carpeted our house so im going to lay the safe on the bottom on the carpet (the rough part) and slide it to the stairs then slide it down and flip it. I will completly cover the safe with carpet to insure no damage to it and to prevent damage to the walls.