Most of the openers we pull out of Riverside garages are the originals - or close to it - because the houses here went up around 1963, right in the middle of the 1955-to-1984 wave that filled in this whole side of the service area. A straight swap, new unit on the same rail, same header, usually runs the length of a single visit. What adds time is the header itself. Houses from this era were framed for a door, not a door plus a 15-pound motor hanging off a bracket, so we're often adding blocking before the opener goes up at all. If the garage has been reframed or the door replaced since 1963, that step disappears and the job moves faster. We won't know which case you're in until we're standing in the garage, so we don't quote a single number for every house on the street - the framing underneath the drywall decides it, not the model of opener you pick.