Ordered some aluminium mesh to fill in the side triangles on the frame the area in green is required for the IVA, but we noticed on track we were getting stones/pebbles up through the blue area, not so much on track as they are cleaned by the other cars, but once we were in the pits or turning around, so I suspect on the road it will be as bad.
So I bought some from ebay, 40" long, this is how it turned up
So I bought some from ebay, 40" long, this is how it turned up