The hot bodies brand are great cars handling wise but maintaining them SUCKS! I was not impressed by how fast the CVD's wear or how the pins fall out because they wear in a flat spot and work their way free. The plastics got sloppy really fast, plastic hubs are extremely fragile. I am not knocking on them straight out I am just giving my honest opinion. But then again I came from mugen and then went back. If your gona spend the 650 just get the mugen it doesn't need upgrades, just build and go! The arm issue is minor and pretty much just a buggy thing. They don't all of a sudden break for no reason, if you acutally spend the time to look the swaybar mount cracks and usualy not for like 3+ gallons or a really hard hit on something RARELY resulting in a DNF.