The people who show up at your house are the same people who answer the phone and quote the job - there's no dispatch layer in between guessing at what you need. Given the age spread of homes here, from late-1930s builds up through 2009 construction, we see a wide range of hardware: older side-mounted torsion setups, extension spring systems from the 60s and 70s tract-built years, and newer center-mounted torsion systems on anything built in the last couple decades. Knowing which era you're dealing with before we even pull up the driveway saves time on-site.
We're straightforward about scope. If your job is a five-minute roller swap, we'll say that on the phone rather than padding it into something bigger. If it turns into a bigger repair once we're looking at the actual spring wire gauge or track alignment, we'll explain why before doing anything.