The job starts with the header, not the opener - we check that the mounting surface is solid and square before anything goes up, because a new motor on a soft header will loosen and sag within a season. From there it's disconnecting the old unit, running new wiring if the old run is degraded, mounting the rail and motor, setting travel limits and force, and testing the safety reversal sensors with the door itself, not just the remote. On Holly's newer housing stock this usually goes cleanly since the header and framing are square to begin with. If the door's spring tension isn't right for the new opener's lift, we adjust that as part of the same visit rather than leaving it as a second call.