I currently have the quad FCS TC-Aqualine fins but lost the back two fins. I've just bought the 5 fin setup and plan on taking out the rear quad fins out for myself and sell the thruster setup. The thruster usually goes for $85 but I'm selling it for $60. These are brand new, never even screwed into a board. I'm in south jersey and they're available for pick up. I'll consider shipping them but I'd have to receive the money first. We'll talk shipping cost depending where your at. Send me a message if your interested.