I work in the industrial plastics (polymer) industry. Some manufacturers are using polymers now, but others, stick with the wood. Cost is definitely the driver for the material decision. No one wants to spend a penny more for a "better" material. As long as they can throw something in there that will last through a warranty period, why incur added cost and reduce profits? Sad thing is, polymers do exist that can be a direct replacement for the wood used. "Expensive toys built with the cheapest parts manufactured by the lowest bidder." Merica