I had done some searching on the durability of the oversized chromoly stubs but hadn't found ppl talking about breaking them. I would be using an r230 diff with their adapter to fit the 930 cv's to the Nissan 6 bolt diff output which should be strong. I had thought about having the diff outputs treated in some way to make them stronger. The driveshaft shop kit is quite a bit more affordable and should be just as strong or stronger than the modern motorsports kit. Driveshaft Shop has a pretty solid reputation with high hp cv applications.