yakima's got a kit for securing the rack at the hitch, and I guess I can weld the top part of the rack, but what about the bolt that holds the adapter tongue to the rack post? Somebody could easily undo that and walk away with my bikes . I guess I could sand down the bolts to keep a wrentch off, but it would kinda suck if I wanted to replace something. Any ideas? Does yakima have a solution? Could I get a locking in that would fit?