Flint
Let it be, Flint. The machine doesn't need to be resurrected here. I'm not terribly fond of the idea of tapping into demon energy, either. You're exploiting a sentient--and yes, evil--species for your own ends if you do that, not to mention perpetuating the problem of having demons about in the first place.
It was brilliant. A bit like living on the Serengeti, but beautiful, all red and silver and gold. The Time Lords were a bit pompous, but most of them meant well, at least in the better days.