27. We put a little grease in the bearing guide and packed it with balls. We then reinstalled the guide in the rack piston. We applied some grease to the interior helix between the two guide holes, and pressed the remaining balls into this greased area. With all the balls in place, the rack piston can be slid into the housing bore and the worm turned into the piston helix by turning the stub shaft and pushing the piston into the housing. You may want to consider removing the hex end plug to watch and make sure no balls fall out of place.