No system on the truck at the moment i'm kinda waiting around to see end weight of truck but i won't be getting a MMM it will never do i started out wrong on everything out the box but 6s won't be enough for me my truck is a SO HEAVY that it worries me and on the diffs i'm waitting on the diffs thats on the hpi europe site no need for the cenn stuff hpi just made there own better than the bullet proof stuff they have now. it still will be an all castle system