I built a Star Trek Guardian of Forever diorama so Kirk can travel through time as well as space

Following up on the Star Trek Gorn Battle diorama I shared last week, I've designed another set based on a classic TOS episode - the time travel adventure 'The City on the Edge of Forever'. In this 1967 episode, the Enterprise crew discover the time-warping Guardian of Forever portal in an ancient alien city - but a delirious Dr McCoy jumps through it and somehow manages to change history. Kirk and Spock must chase him back to New York in 1930 to preserve the timeline, with some...