Faiz-I took a look at the prototype BD at the yokomo web site. I could not find a clear photo of the rear drive axles. I suspect they are the typical single universal joint type that are not constant velocity joints. These have accelerated wear only when used on the front with a locked diff. My losi constant velocity drives (LCD's) outlasted about 10 TC3 aluminum bones (MIP drives) while using a locked diff.
John