I am going to be entering my first race here in the next two weeks. Any tips for the first race with this truck? I have it set up default set up and was just going to go from there. It seems common though from reading this thread that the springs in the shocks normally need to be replaced with something better? I am going to be running on a clay track, but it hasn't been fully packed down yet as they are just putting the last touches on the design. Any tips for running on an ungroomed surface?