There's a soft peeping sound from behind Jamie's shoulders, and his pet Zubat pokes its head up out of his shirt's hood, trilling sleepily in Greg's direction.

"Tetris?" Jamie scrunches up his face in confusion for a moment before shrugging it off. "Well, it's a mess, anyway. But you're right, I think the only stuff that needs swapped out we've got spares of already - just some washers and this belt." He points to the parts in question. "That flywheel's starting to look a little rough, though. What do you think?"