Writing your own manual begins with all speedster purchases for what you did
"All I did" is a very long list of things I spent money on for my Speedster over the 14-15 years I've owned it. Flying my airplanes over the years, I always have kept log books for the engines and air frames so I made a Speedster logbook with everything ever done, to the car and each cost as well as trips' with mileage, mpg and details of performance. Fun to look over but don't add up all the costs! I would imagine that such record keeping would go a long way towards getting top dollar for the sale of a car from a buyer.