Extension spring era equipment
Doors installed in the mid-to-late 1960s often carry an earlier generation of extension spring hardware than the torsion setups that started showing up on Ashland-area builds closer to 1970. So when a Russell owner calls about a door that slams down the last foot of travel, or an opener that grinds and stalls, we're usually looking at older spring geometry before we even get out of the truck.
