Yes I saw many 70MM films at the Plaza in Auckland and also screened films from that projection room many times, never 70MM. It was a great place to watch 70mm and the only place I know of that installed the curved TODD-AO screen when they showed 70MM, when they went back to 35MM they removed the curved screen and went back to flat screen. They would do the changeover after that last show of the night. Also one of the few places that had a drop down screen over the Waterfall curtain that the glass advertising slides were screened on. I screened 70MM at the Cinerama Auckland which was also great. However the best 70MM was at Kerridge Odeons Embassy Auckland, we had a great curved screen and the top masking went up for 70MM, the sound there was out of this world!
Didn't the Auckland Embassy have a very small screen for 70mm projection? I was rather disappointed by the small size,from what I remember.