If it equipped with the Hydra Drive Unit, when using today light weight Li-po battery, it seems adding extra weight on rear section of chassis, it is very easy wheelie under accelerating and causing difficult control. I suggest you first convert to Losi’s double slipper before purchase any electronic set-up.
But, be honest, I will advise you leave the XX CR, and buy an up-to-date chassis. Because today Li-po and brushless motor chassis seems like longer wheel base chassis more than short wheel base. I am not saying shorter wheel base with today electronic set-up not doing their job but for longer wheel base chassis really do a great job under such mega power. (think about today electric touring can accelerate over 100km/hr).
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