Congrats on the flowering! Any druryi is IMHO always worth the wait - as is yours, too!
Might we see the plant in toto?
I might be in the wrong, but I think one of the more finicky things about growing this species is, that it might very willingly grow and develop the rhizome and set new growths along it, but it might take up to a couple of years, before the new growths are actually properly rooted - and in the meantime there is a hightened risk for fungal infection and the like. Recently I had to fight mealy bugs, that had spread to one of my druryi - and after having sprayed for those little bastards, I lost a couple of the new growths of the plant to rot!