Erin is more helpful at the start than she is as things go on. She seems to be able to see the pieces of her furniture fairly well, but as Ruby brings in more materials and an actual Object(tm) forms she increasingly has to take direction; hold this here at that angle, don't let this fall while it gets nailed in, scoot please. There are frequent breaks to cross the cabin and get a sense of personal space back, but hours of work later Ruby has built...

...What, exactly, O mistress of the self-made bunk beds?