I have changed from the b4 to the xxx-cr and out of the two i defently preffer the cr it is more ajustable very stable it jumps like a car not a lump of rock like the b4 does the b4 does have little more steering which is nice but with a tiny bit of weigh in the front the cr has all the steering you coudl ever want. As i was saying last night the cr looks ace with a really nice paint job on where the b4 looks fat. As for losi tools they are good.
A