yeah, i have it, when you buy carbide ball it come with the full set. i check that out, and i discover that even the old XX-t have ball diff, so no ordinary one from losi. what i think i'm gonna do is use only my MT2 and my mad force in the sand or do like Frost say, just clean it every time.( grrrr )

anyway, i rebuilt and adjust this thing so many time that now i do it in a snap. every bad thing has is good side i guess.

tanks you all for the help.