I also wondered back when Majel was on Babylon 5 her character made a statement where she said something to the effect as she was now on board the station that this was her husbands dream. The way she said it with such emotion and conviction made me wonder if B5 had captured Genes vision and not DS9.
Back on a previous post in this thread, I don't think the polished stone is a smoking gun because we don't know it's chain of possession, the offender could have gotten it from GR, or a completely other source and gave it to GLW, if GLW said the executive said "I made it myself" then that would be more direct, but still not certainly GR. Just saying, because it sure sounds like it could
be he, GR himself.