Swapping a damaged panel means pulling the section out of the track without disturbing the spring tension on the rest of the door, which is harder on an older door than it sounds - hinges on a door from 1989 have usually never been off, and the bolts can be rusted enough to need cutting rather than turning. Once the bad section is out, we fit the replacement panel, re-hang the hinges, and check that the track still runs true on both sides, since a dent severe enough to need a panel often tweaked the roller track too. If the door is a standard width common to the area's late-80s stock, this is usually a same-visit job. If the panel had to be special-ordered, the drive from Madison happens twice - once to look, once to install.