The REX controls awkwardly, barely not touching the walls of the hallway, clinking and clanking throughout. I kept the cockpit open as I spied a room with a rather conspicous sign reading 'CORE ROOM'. The door was much too small for REX to fit through, so I merely used it bust down the door to get in.
I hop out to get in, looking south of the room to see the teleporter the note spoke of. Everything appeared to be going to plan as I stepped into the core room, followed by Knife and Grim.