how does one do this properly? do i need to get different size balls for the ball bearings, or just more balls. i already took it apart, and it actually turns out that either i lost a ball, or ive been riding it without one for a while. since i took it apart as carfully as possible and didnt hear one hit the floor or see it anywhere on the floor i think they shipped me this wheel with a ball missing in the bearing. and i called shimano, apparently it normally uses for the outside bearings 7/32 and for the pedal drive bearing 1/4 diameter balls. it looks like the cage thats between the balls has enough space in between each ball for another ball, potentially a little more. their are supposed to be 9 balls total i think in the outside bearings.