When Roger was building his Mark II model he enlisted my help in getting him some measurements off a spare pair of valve covers.



Roger's originals new made from layers of brass stacked to make the ribs.



Roger made me a mold. I was considering having a jeweler cast them as key fobs with a loop or without, as a display item. They could be cast in brass, or silver, or gold if you'd like. Let me know if there's any interest.