Re: Ueshiba's Golden Lights
The top exponents I've seen are Otake Risuke, Sugawara Tetsutaka (who also studies t'ai chi) Shigi-san (I can't remember his last name - he, like Sugawara, have separate organizations), and two deceased individuals: Donn Draeger and Noda- sensei (a sempai of Otake).
I'm not a member of TSKSR - I'd suggest research with those top figures, if they are willing to engage in such a discussion. Shigi is a 6th or 7th dan in judo as well - and is remarkable in randori, while close to 70. (And I don't mean young guy being polite with old guy randori, either).