The most common surprise on a Southworth call isn't the spring - it's the opener. A chain-drive unit from the early 1990s often runs on a control board or logic board that hasn't been made in years, so when the board goes instead of the gear, there's no repair, only a replacement. We're upfront about that the moment we see the model plate. The other place it goes sideways is insulation. This area sits in a mild climate band with occasional freeze, not the deep cold that cracks vinyl weatherstrip outright, but enough that original, uninsulated steel doors from the 1990 build era have usually gone soft at the bottom seal by now - the rubber's compressed flat and doesn't seal against the slab anymore. That's a cheap fix on its own, but it's easy to miss if you're only looking at the spring. Our honest limit: if the track is bent badly enough that the door binds on every cycle, straightening it is a temporary patch at best, and we'll say so instead of billing for a fix that won't hold.