sorry to dig this from the grave, but it`s an interesting topic.
just had a good read over and since ive driven the car after being stripped all i can say is, if you dont need it, bin it!
to answer some questions.
rear seat belts are not required if no seats are fitted, that means all parts of the seats must be removed i would include the seatbelts too to be sure (and to save weight).
you need to declare ALL mods to your insurance!
by saving weight you not only increase power to weight ratio but it also improves handling.
when my tax comes through the door i plan to take a trip to the local weigh bridge and get the car weighed for a rough idea of how the car weighs over stock.
i`ll keep you posted.
