Electrathon Race Car design

grabcad

I am in a class where we are building electrathon race cars, we would have loved to use this design but we didnt have enough metal. Mass = 13.10 pounds In the design you will see some sketches that i didnt put Weldments on because we origanly were going to hide the tires, then we voted it out. But i got so far into the design that deleting it just causes a whole bunch of errors. Hope i uploaded the right file.