We're not going to promise a fixed number of minutes on site, because a door that's had regular attention takes less time than one that hasn't been touched since it went up around 1987. What we can tell you is what the visit covers: spring tension check, track alignment, roller and hinge condition, cable wear, opener force and travel settings, and the safety reverse test. On hardware from that build era, we often spend extra time on the torsion spring and the opener's force settings specifically, since those are the two components most likely to have drifted out of adjustment over three-plus decades without anyone noticing until the door starts sticking or reversing oddly. If we find something that needs more than a tune-up - a cracked panel, a cable close to failing - we'll say so on the spot rather than working around it and hoping it holds.