Nathan did his D2 work first, but it didn’t put him on the map. The Delta 3V HT protocol is a big part of what did, and that was essentially a 3 way collaboration at the time.
And there was a separate design collaboration with Lorien.
That isn’t a coincidence nor do I say it to take anything away from him. Things like the comp chopper came out of that success because it provided the resources required to pursue those interests.
A sad part of that success came at the hands of another makers failing, but this is life.
The question after D3V became what’s next? We found out regarding 4V. Well, I can tell you two things. Nathan gets bored of things, then he doesn’t want to make them anymore.
Second, pique his interest in a project and that is how you are likely to find he will work on it.
I believe, rather than pointing him backwards at a project that at this point was probably 10 years ago, and have him repeat it, why not take the desired application, research it yourself, find a specific need, and then see if Nathan can take what he’s learned for example the metallurgy and ergonomics, and combine it with hopefully a new material that he might find interesting.
That’s a good way, in my experience to have him visit a topic. I say this as someone who years ago worked very hard to get a run of a discontinued project, and felt some guilt about it afterward. I think Nathan actually liked me less for it.