I just bought a new Revo 3.3 and within the first 4 hrs. I had broke both front bulk heads and my steering assembly. I have already replaced the steering assembly with aluminum and the bulkheads with stock plastic. I want to go ahead and get spare front bulks but was wondering if I should go with rpm plastic or aluminum? I tried searching for an answer but am new to the site and had trouble finding what I was looking for.