This adds much needed stiffness to the long flat side of the Milan. While the panel was strong enough without the rib it seemed to act like a sounding board for vibrations from the road. To further reduce this I have rebuilt the rear fender. Here you can see the first half.
What different about this one is that it considerably stiffer by the addition of an extra layer. The extra layer is the material Bio-Mid which is made from sawdust from western Canada. The material looks much like regular fiberglass but has a density similar to Kevlar. It adds thickness to the laminate without a lot of weight. Having this layer between two layers of carbon optimizes the carbon's properties.