Mount Pleasant, 10 miles out, Thompson's Station at 15, Lynnville at 17, Lewisburg at 18, Chapel Hill at 19, and Summertown 20 miles beyond that - six different pockets, and the common failures shift with the age of the houses in each one.
Across the service area, housing runs from 1938 up through 2013, with the median landing at 1986, and most of what's out there was built in that 1980s-90s stretch. That means a lot of original torsion springs reaching the end of their cycle count, steel panels starting to rust at the bottom seam where water sits, and openers from that era with logic boards that just quit rather than failing gradually.
The older end of that range - houses closer to 1938 - more often have side-mounted or low-headroom torsion setups that newer parts don't always fit without an adapter. The newer end, closer to 2013, tends to bring us belt-drive openers with a sensor or wiring fault rather than a hardware problem. We don't stock every obsolete bracket for the oldest doors, so on those jobs we tell you up front if a part needs to be sourced rather than pretending it's already on the truck.