The trick wasn't exclusive to Kids' Tower, though. @cpw made a series called Conquer full of ways to utilize the claustrophobia + autopilot combo.
@Scare Crow Spoiler Once you are on the vertical slider without rail, you can just tab on the other vertical slider and the raise the slider without lift. I see no claustrofobia here as you sent B directly 2 squares away.
@Block builder Spoiler claustrophobia can be observed while you tries to climb the vertical slider with rails