I have been using a Givi E460 top case and decided to go with some side cases probably E21's. I need to know from any that are running givi side cases which rack? I have seen a detachable, SW Motech? Stay with the Givi? I lide th idea of quick detachable racks so there is nothing hanging on the side when the side cases are removed. Cost? Troubles? Advice please. Mike in Fremont, Ca.