David -that plant is a beast....congrats! I wouldn't take this year as an indication that something is wrong with the plant given it didn't bloom. This was/is a strange year for my Stanhopeas and most of my S. oculatas didn't bloom this year either. We had such a cool spring and early summer that many of my Stanhopeas didn't start growing until a month ago. I even have some winter/spring blooming species that are putting out inflorescences now!
That being said, your S. oculata looks like it should have bloomed since you re-basketed it two years ago. Make sure to fertilize it well this summer/fall and boost the growth on it. Get those pseudobulbs to be as fat as they can, so that it can't help but bloom next year. You may also want to find a place on your patio next year to let it grow outside in the shade during spring/summer. Several of my friends have had better luck blooming their Stanhopeas outside rather than in greenhouses. Also many of my S. oculatas seem to bloom better when I treat them like S. jenischiana and let them go a little more dry in the winter, though still somewhat moist. Several Stanhopes bloom more sparsely when they get really large, but yours looks a few years away from that.
Good luck pushing the plant to bloom....let us know when it does!