I dont know if anyone else has tried this but i used 2 thumbnail size pieces of aluminum foil to remove all the wheel slop from my 1/16 e revo vxl. i just took out the ball pins and wrapped the aluminum foil over the top and then poked out the whole for the hex wrench. then you put it back in the axle carrier and move it around so it has free travel. you dont have to use 2 pieces just however many you need for each ball pin to not wiggle anymore but still move freely in the socket. let me know what you guys think. it worked great for me so i just had to share it.