I agree on the door padding. I got some high density foam pad from Coleman Racing for around $30 and it was enough for the left side door and part of the right side. It will not stop a door from caving in, but may cushion the impact if the door comes in a couple of inches in a crash. Plus, I kept hitting my arm on the door bar during the first couple of races when I got my elbows up too far and this really helps.