how expensive do ya think carbon fiber would be? just for kicks I called Marcell's, the people that did boydes alumatub roadster and enquired about a aluminum top for a 73', and that my top could be the sample. they said they could do it but unless you are doing a 200,000 show truck it would not be worth it. they said it would be in the 10,000 to 15,000 doller range. and with off roading and the flex it would probably crack the welds after a while. how bitchin would a carbon fiber top be though. super light ,easy to remove.