Ordered 2 new wheel upper assemblies and used parts from the three broken ones to come up with one more. The two ordered wheels arrived extremely fast using standard postage. Watched the generic youtube video to get an idea of what to do. Even so, lining up the wheel assemblies on the baskets took some extra time to figure out on the first one but the other two went much faster. Works like new. It was really easy. I used needle nose pliers to release the rail locks, the only tool I needed.