that means nothing, ty is sponsored by PL so he is going to run any option parts on the car to promote that part, needed or not. Those plastic caps look pretty tuff, but it may just be a nice re-assurance to run aluminum.
I am loving the design of this new car. To me, it interests me way more than the new losi, 44.2, durango, or the new kyosho. Cant wait to get one