When I decided to put my Batman game in the movie room (two sets of narrow stairs with two 90' landings) I basically removed everything from the cab. I pulled the CP/drawer (cabinet is one of the ATARI universal cabs from the 90's) which houses the main PCB and power brick and I also removed the monitor. Once all of that was out it went down the stairs nice and easy. Since I had it all apart I gave a a really good cleaning too, only took me about 20 min to get it all back together and working. Now the Pin I moved down there was a whole different story....
-Dave