I had a lot of aluminum parts in my Rustler and ended up switching back to aftermarket RPM arms, rear strut tower. Plastic at least gives, but Aluminum bends and then your ride is all jacked up.

I ran my friends rustler into the rear of my back tire at about 50 and his truck exploded, even the paint came off of the inside. luckily I had all my gear and was able to fix it there on the spot....that's the fastest I have ever seen an RC car come to a complete stop. Lol

Jeff