i'm just about to fabricate 6 pieces for my gtv6.now from the pics they appear to be either 1/8 inch thick or 2 milimeter.besides that any one know what type metal is used? i would assume if i had money to burn i would fabricate them out of spring steel with the right amount of give ,but not as much give as the donuts themselves.that would require quite an expense for r&r. but who has money to burn?going from the ridiculous to the practical could any one tell me why they are the shape they are and not simple triangles? for beauty? for the 20(?) grams of weight savings?