Possible Clues:

• To make money, about time to replace plumbing for a start and install mod cons
• Equip with new parts
• Later adjustment, or net profit after initial losses
• Add (component) not originally in place
• Upgrade, as an airplane
• Fit with accessory not on original
• Modify a mechanism
• Row about trading station returning to make change after delivery
• Modernize, as an airplane
• Funny looking fitter or component added after manufacture