Ultravision Theatres 1 & 2

This is a surprise: ABC (under the Florida State banner) operated another Ultravision Twin in Deerfield Beach FL (between Ft. Lauderdale and the Palm Beaches) from 1970 to 1985. It’s also listed here at Cinema Treasures. Raymond, was the Charleston location a round auditorium, or more square (since later twinning was mentioned)?

At least one other ABC venue, the Dolphin in Palm Springs FL, initially promoted “Ultravision” screen technology. Could this have been ABC’s response to UA’s Cine 150 style of the late 60s?