I have two 12R5's and have one set up for my local asphaltt and the second one I am not sure if should sell or set up for carpet. The carpet track opens about the same time the asphalt closes for weather since it is out side. So my question is how much of a change will it be from carpet to asphalt? If I decided to sell it with are they worth since its a 12r5 and the 5.2 is now out?