It depends on how "cocked" the engine is as to if you should worry or not. It seems like mine is cocked slightly, but I've run quite a bit of gas through it, and no problems, and no abnormal tooth wear. I also have the 16T bell on mine, so that may make the problem worse for myself. The foam in mine is just along the side of the battery. I haven't tried putting the other piece on top to wedge the battery in there. I haven't heard or noticed any movement from the battery like this.

Your hardware issue seems strange. I haven't noticed any damaged ones on mine.

I will say everything people have said about suspension breakage is true. When I first read threads about the problems, I figured I didn't have anything to worry about because I don't "race" the car. I figured everyone else were being hard on their's. But, now I have broken or bent both of the front A arm hinge bracket thingies(the purple pieces that support the pins), 1 shock cap, a control arm hinge pin, the front and rear shock towers, and 1 lower control arm. The accident that broke the most parts happened when the truck ran into a house. This happened because of radio problems(another problem I'm having that other's don't seem to, and that I don't have with a different HPI product). Of course, crashing into a house at full speed is going to break things. However, I've broken a lower control just by brushing a curb, and bent shock towers just by rolling the truck once. The truck is somewhat heavy, and fast, so I understand some damage, but it's unfortunate how most of the suspension seems under built for the truck.[]

Once I replace all the plastic parts with billet aluminum it should be awesome!!!! RIght now I'm waiting on lower control arms.