An system and method for providing software upgrades to components of a vehicle, wherein the labor, time and expense of providing the upgrades are minimized. The fixing part being configured to be immovable relative to said distributor head, and a part movable relative to said fixing part. The first base stock comprises a viscosity greater than 100 cSt, Kv100\xb0 C. The present invention provides a compound represented by the general formula or a pharmaceutically acceptable salt thereof:. The wear surfaces also assist in conditioning the sensed soil surface by smoothing the surface prior to sensing. More particularly, a method and associated apparatus which compensates for variations in amounts of a radiation sensitive material in a radiation dosimetry film is provided.