After seeing rchippie's buggy with the center adapter that mike had made for him. I talked Mike and he made me a center diff adapter to fit a Ofna 51t plastic spur gear to my Hyper 7. It's beautiful. It was made from a solid piece of aluminum and it fits nicely. I've got it in my buggy but, have not had a chance to run it with the new adapter yet. This is a good way to go. Here are some pixs.