To improve straight running stability on an off-road. The method includes the steps of defining a desired filter characteristic and applying an algorithm which provides a filter having infinite Q factor elements and having a theoretical characteristic corresponding to the desired characteristic transformed to a compensate for the difference between finite Q factor and infinite Q factor elements. To define a second ray, data defining such can comprise a reference to the first ray and attribute source information indicative of shared attributes between the first and second rays. The inner wall of the bin tub at the lip and an inner wall surface of the lid bounding the perimeter channel are of complementary tapers. Rotation of the adjuster causes the cam portion to engage one or more of the engagement surfaces, thereby exerting a force on the engagement surfaces to move the moveable member, adjusting the position of the swivel mount.