Factory-installed safety sensors
Russell leans toward that 90s side rather than the newer 2000s construction you'd find closer to Braselton or Dacula. That's a meaningful split: later-build doors (2000s and newer) are more likely to have factory-installed safety sensors and steel-and-polystyrene insulated panels, while Russell's early-90s doors are more often single-layer steel with retrofitted safety gear.

