I was interested by the title of this project. And after I read the posts, I find out it is really close to my dream VR world. I think I could help on many things, if I am interested in. Mostly on coding on algorithms, but not really optimized. I see your project in my head clearly. Please let me know if you want me to join.
Ah, I think you can add “circuit from paper” function which allows you to design in 2D and let it generate circuit model for you. Because I think 3D maneuvering of hands or tools are quite hard.