att about the cup washers that look like thin caps. u do not need them with the gcs. they stop the top perch cap from moving if installed on the shaft of the system. the gc cap is spose to move freely. the gcs is a linear system that can move and set into place when lifted adjusted and dropped to ground. i called gc on this and dont use them. and vicing my tubes i crimped them at the lower thicker part trying to avoid all warping. maybe it has to do with the 97 model ???? who knows.