Nice job! I love nobile Dendrobiums both for the fragrance and the display. I've had several in the past but, as a windowsill grower, had to give them up due to their size.
Most people advocate tossing plants that look really bad, into the trash pile but I am a nurturer and find it a nice challenge to bring health back to a sick plant.
I can't feel good tossing plants just because they are ill or in serious trouble. Apart from the educational experience, I find saving them more rewarding than a bloom.