Premier advertised for sale a "Booster-Pack" as a fifteen minute art & sound conversion kit for any Rock pinball game. It consisted of a replacement photo translite and three new sound ROMs. Designer John Trudeau contacted us, indicating that not all 'Rock Encore' games were conversion kits:I was rolling through the website and suddenly realized that the pictures of "Rock Encore" are only of the converted "Rock" game. There is an entirely dedicated cabinet for the "Encore" edition with different side art out there somewhere. I don't recall how many of these were produced, probably a few hundred. If I had a picture of one I'd gladly share it. As I recall, It was a black base paint with squiggly lines and small geometric shapes of different colors (pastels) scattered over the entire cabinet, like confetti thrown in the air. Photos of games produced in the "dedicated cabinet" are now in this listing. Larry Day told us he did the art for the playfield and cabinet, and Don Marshall did the photographic translite. Ken Hale told us he is the keyboard player shown on the translite.