Mirrormont's houses mostly went up around 1978, which puts this pocket a bit ahead of the 1983 median across the wider Issaquah service area. That six-year gap matters more than it sounds. A house built in the late 1970s was more likely to get a extension-spring setup on a single torsion tube, or an early chain-drive opener bolted to hardware that's since been discontinued twice over. With 1,544 households here, this isn't a huge area, but it's a fairly consistent one - most garages on a given street were framed within a year or two of each other, so if one neighbor's spring went, the one two doors down is probably close behind. Median household income here runs $182,283, well above the wider area's $148,590, and we see that show up in the calls: more owners asking to replace an aging door outright with an insulated steel model rather than patch a 45-year-old panel that's already been painted over twice. Both calls are valid. We just don't pretend a 1978 door and a 1995 door fail the same way, because they don't.