The BPP truggy in that video weighs over 12lbs. and the wheels used are 3/4 offset so that's why it's turning a bit wider. My MBX5T has a similar set up and it turns on a dime. The reason I don't use a normal diff in my BPP is to the fact that I tried all types of oil thickness and nothing stopped the unloading to the front wheels, plus I think the diff works best when used with the mechanical brakes to allow brake bias.
So u race or bash?
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I hardly have time to bash lol. I used to race a bit when I used to live in Florida. Most of the good off-road tracks in New Jersey are too far for me to go.