The dyno housing is machined in two very precise interlocking pinned pieces (.0001 clearance) & is held together with 16, 6-32 stainless steel screws. No o-ring seal is used, & there is no water leakage during dyno pulls. Notice the lightening slots in the torque arm. This small amount of out of balance causes the dyno housing to rotate in the very low stick slip Rulon bearings. Those bearings are behind the black delrin end pieces & were aligned bored after the cradle was assembled.
