I know no one liked the Pro3 but it did have some good ideas in it. It had longer arms but also they raised the upper link higher then normal. I am not a Losi fan but this car has me curious to see how it does. I had a pro 3 and on asphalt it drove killer.just didnt do so well on carpet. And the fact that the chassis twisted so bad that the belt would start binding and slow the car down. This should be interesting to see the final production of the JRXS.