Paul, as I only want to do this once I want to be sure of the parts I put in, so I'm only using new parts. I know its more expensive but I don't want the car off the road for more time than it needs to be, I enjoy it too much!! This is the first big money I have spent on the car since I bought it and its retained its value in that time, I would have cirtainly lost more than I have spent in depreciation had I bought any other sports car.