I remember the Himalaya well. I was head electrician on Million Dollar Midway that year. I especially liked the aluminum backwall & the Basketball window!
Oh, you were the guy running around with the co2 fire extinguisher cooling the circuit breakers?
LOL Actually, I saw that technique used on the Million $ in 77.
The wall components and backboard all came from Roadway Express. I sometimes went there 4 times a week. I had no idea what the backwall material was. It was framed, perhaps aircraft parts. The sheeting turned out to be a 3mm pvc core/aluminum with skin both sides, sold today for the sign industry.
What did you think of the light package?