I had used some rubber washers on the cowl bolts so the paint on the cowl would last forever. The rubber washers were a little too big and didn't work that well. They would squish out from underneath the head of the bolt too easily when they were tightened.
I decided to use a smaller o-ring under the head of the cowl screw. Where do you get o-rings? The o-ring store.
The new 2.5mm o-rings worked much better on the M3 cowl bolts.
I liked the idea of the black anodized spinner backplate, but the aluminum and black spinner combination look great with the black baffle and aluminum cooling fins of the engine just inside the cowl.
