DDJ SR2 Crossfader Reverse Remap

This may have been asked before but does anyone know if it is possible to remap the crossfader reverse to one of the buttons on this unit? I scratch traditionally for most cuts but as soon as I get near 1 and 2 click flares I default to Hamster mode, which is fine on my stand alone mixer and turntables as there is a dedicated reverse switch, I would love to be able to change as easily on the SR2 during a gig without having to dive into Serato preferences.

Thanks