i have used the sand paws on my gt2 in the sand there awsome. if ur gunna use it strictly in the sand like not racing at all i would take the balls out of the diff and jb weld it together so it locked (if u decide 2 race just buy a new diff) then get some mip cvd's (stock dogbones twist with a locked diff) and the AE posi lock hubs if u dont have em already cause losi style hubs strip the rim when the diff is locked due to both wheels are gettin full power around corners and put a lot of stress on the rim basically sand is gunna wear out ur car it gets in everything unless u plan on a complete tear down wipe down and a wd40 spray youll be buying new bearings and ballstuds fast way to clean it out after a sand bash take the electronics out and the engine and trans soak it in the tub in warm water spalsh it around in the till she looks mostly clean then blow the fuel tank out wth compressed air til its 100% dry then blow the whole car off and load on the wd in all the joints and pivots then wipe it down
hope this helps ya

peace