School was also in laserock platinum - I might be able to get a good transfer. There was an effect that was added with/after the Beatles show where the old chopper was mounted. It was just an EM-20 with a blue red dicro on on side and a yellow green dicro on the other. With no power to the EM-20 the beam was undisturbed, positive inserts one of the dicros in the beam, negative the other. I used the red blue in school.
I was long gone when Zodiac came out.
"There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso