[nathan_hui]

Most of us (I think) in talking about the weakness of the chassis are talking about the lack of a bellypan. Without that, the rigidity of the chassis is determined by the play in the fasteners holding the chassis together. Now, you wouldn't notice this play in competition, because you have a superstructure on top, which probably took out that play. Or, you were lucky, and didn't stress the fasteners enough to have them slip.