I have everything I need to build another strut assembly using my lowering springs but am unclear on the need for the rubber sleeve at the bottom of the springs. The previous owner installed new strut assemblies that do not have anything at the bottom of the springs, they are seated in the strut, metal to metal. The parts diagrams list a sleeve for later GT500 models but not 2008. I called Steeda and spoke with someone who sounded unsure, he said I could transfer my sleeves over to the new assemblies, problems are 1) I'm not disassembling my old strut assemblies and 2) even if I were assembling them they do not have any sleeve isolators. Does anyone know if this is needed or should I just seat the new springs in the struts and move on? Thanks. Mike