A straightforward torsion spring swap, once we're on site, doesn't take all day. The time that varies is what we find underneath: original 1970s hardware that's never been serviced can mean seized drums or a bearing plate that's worn oval instead of round, and either of those adds time on top of the spring itself.
With 7,573 households in Libertyville and a housing stock that's mostly landed in one narrow build era, we see the same handful of spring and drum combinations often enough to carry them on the truck. That's the practical upside of a town built in a fairly tight window - fewer surprises on sizing, even if the wear pattern is consistent across the neighborhood.
What we can't promise is a same-day slot every time; that depends on the day's schedule out of Gurnee. What we can promise is that once we're there, we're not guessing at parts.