Getting data back via radio seems physically realistic using the gravitational lensing of EM by our sun. It would require us to put a receiving and relay stati

Getting data back via radio seems physically realistic using the gravitational lensing of EM by our sun. It would require us to put a receiving and relay station very var out beyond the planets, at least 550AU, I think. But by the time we are sending a probe several light years, then 550AU should practically be child's play. A good paper about using such lensing: "Interstellar radio links enhanced by exploiting the Sun as a Gravitational Lens" by Claudio Maccone.