By the time you get up to speed I would be dead. Every time there is a breakthrough it's always too far in the future. Pity my 3d printer can't do it. So a kidney if it's that Complex why not redesign it to be a simple print. It wouldn't have to be exact but functional to us who are awaiting the organs. Take a car engine complex machine been around for years , then you have electric car engines does the same job but simpler in design. ( get it )