I've been around this kind of stuff a bit. I'd say to stop asking us and ask the best dang lawyer you can afford. It really isn't a matter of anyone's opinion. You are establishing precedent and corporate policy. Both are heavy items. And modern law is a technology that is at least as sophisticated as programming the guts of 3D software. Give the lawyer all the data and tell him/her what you would like to accomplish, and they will usually come up with a way to do what you want. Good lawyers can work pure magic.