My head hurts. My eyes hurt. I feel I can hardly form a coherent thought. And I like it. That's right, I am absolutely mentally exhausted, but it is a rewarding feeling. I have been working really hard on building a cost model for a relatively new type of surgery. It isn't done often because the new technology that it relies on carries the stigma of being very expensive. And it is expensive, to the tune of 1.2 million dollars for the unit. But it also carries with it the potential (...