>>294041127
>is it better to stick a Leapmotion to a Vive Cosmos to track fingers, or just stick entirely with a Rift S?
Rift S doesn't have finger tracking yet, but you're better off with it either way.
Unless you've got a really specific thing in mind that uses finger tracking and doesn't need controllers, I don't think a Leap Motion is going to be worth it.
>how often and acceptable is it for people to use open licensed model components (like hands, etc) to speed up modelling and commissions?
For personal use no one is going to care what you use at all, but I'd be careful about the licensing on anything you're selling.