Of course, he's gained a little more insight than knowing the leftover pieces are probably needed. He doesn't advertise his service, but people still find him to fix their clocks. Every year the pool of old clocks gets bigger. People inherit family heirloom clocks they want to hear strike again. People want to keep maintaining them because they are relics of their ancestors.
Clocks outlive their owners.
They'll outlive me. Hannon's career choice takes him far from the hands-on experience of mechanical workings. He left engineering to become more involved in environmental work, he said. It's work he likes because of the concrete results. There's also another kind of pleasure in fixing a clock and hearing it tick off time again.