I haven't had a lot of time to run my v4 bonzer, I just got it a little before christmas . I came to the quick conclusion that head on hits with imovable objects aren't good [:'(]. I have broke a few things as a result (shattered front bumper, and what I think is called the wheel arm). I have ordered some spare parts from hammondtoy.com and a new set of shocks from Hong Kong. I hope the new shocks take a bit more pressure off the other cheaper plastic parts. Other than the head on hits, the truck has taken everything I have done to it . When my sons truck comes in, I am going to tell him just not to hit solid objects that are taller than the bumper. The v4 has a second set of holes closer to the body on the wheel arms, I am not sure if the other versions have them. I think they are there to give them more ground clearance. I might try that once I get my parts!!