Well, If I was able to do the anodized thing it would have to be blue. I'll probably have to just get the least expensive regular aluminum one that I can find. I saw a few on ebay around $35. As for size, I measured the circle at the front of the cowl. It is right at 3 1/2 inches. So a 3 1/2" spinner would match that part of the cowl perfectly. I could get away with 3" or 3 1/4" as well. A 3" would only leave 1/4" of the cowl circle exposed on each side & would still look good. A 3 1/4" would only leave an 1/8" showing on each side. So what do you think, what size would you go with??