Thanks for the welcome and the heads-up on community vibe.
Honestly, my 'home' Datsun forum 'The510Realm' can also have some passionate members. I'm fine with respectful scrutiny as it's often just a 'why' or 'prove' question which is the basis of Critical Thinking and how we eventually engineer improvements - and the birth of these axles to be honest. The 510Realm thread that John linked to above was my coming out party, and the goal was to bring these CVs to the community Datsun gurus to scrutinize to death. Trusted members were given more in-depth engineering background and their subsequent honest opinions is posted for all to see.
CV vs U-Joint is sort of like Fuel injection vs carb IMO. I nicely tuned carb setup runs pretty damn good and it's only 'disadvantage' to Fuel Injection is overall refinement (weather, startup, MPG). Both setups can run well and offer a specific experience. If a customer is looking for additional smoothness/refinement (basis for Restomoding), then any CV is a viable consideration.
My 'business model' is a little unique, as previously mentioned DatsunRestomods is not my livelihood/source of secondary income, nor do I need it to be. This is my way to give back to the Datsun community and to fulfill a craving to create out-of-the-box solutions (and there's some good ones coming up IMO).
The scope of my 'selling' will be limited to the vendor section. I'll post a thread there when ready along with pics of S30 installs - several are out there already.