Boone sits in a severe cold climate band, and that changes what fails and when. Steel contracts in deep cold, torsion springs lose a little tension every winter cycle, and lubricant that was fine in October turns gummy by January. On a door installed when Ford Pintos were on the lot, none of the original parts were spec'd for the freeze-thaw cycles this town gets every year. DIY guides assume a generic climate and a generic door age. Neither applies once you're dealing with 45-plus-year-old torsion hardware in a place that gets hard winter cold. The other local wrinkle is income and ownership: this area has 4,331 owner-occupied houses against 3,578 households, and a median household income of $81,346. That's a lot of houses where the owner has equity and reason to fix it right rather than patch it twice. A cheap universal spring from a big box store, rated for a mild-climate door half the age of what's actually on the wall, is the kind of fix that looks done and fails again in a year.