Winnetka's housing stock runs older than most of the towns we cover from Evanston - the median build year here is 1938, a couple decades ahead of the broader service area's 1959 median. That gap matters on a garage door. A house built in 1938 was not built with an attached garage in mind, let alone a sectional door on extension springs. What you often find instead is a garage added or converted decades later, with hardware retrofitted to fit an opening that predates the industry standard. That means odd-width doors, jamb brackets shimmed to fit, and torsion springs sized for a different door than the one currently hanging. When a spring goes on one of these, matching the wind and wire gauge takes more than pulling a part off a shelf - it takes a measurement, because nothing about the opening is guaranteed to be standard. We travel out to Winnetka from Evanston, five miles away, and bring wire and spring stock sized for exactly this kind of mismatch, because we see it often enough on this side of town to plan for it.