The failure point in Edgewood isn't exotic - it's math. A door and hardware set installed around 1976 has had roughly five decades of cold-season cycling, and steel, springs, and seals all have a service life well short of that. Swap in a newer build year and the same conversation doesn't apply, because the hardware simply hasn't aged the same amount. This is also why a straight panel swap onto 50-year-old track is a bad trade: the new door outlives the old rail by years, and you end up paying for labor twice. We'd rather tell an Edgewood homeowner that now the whole opening - track, springs, and door - gets replaced together than sell a mismatched fix that looks cheaper on the invoice and isn't.