We work out from Skokie across 64 named areas, and the stock varies enough that it changes what breaks. Nearby: Golf (3 mi), Niles (4 mi), Kenilworth (4 mi), Winnetka (5 mi), and Northfield (5 mi) - short runs, easy to fold into the same day. A bit further: Harwood Heights (6 mi), Glencoe (7 mi), Rosemont (8 mi), Schiller Park (8 mi), Elmwood Park (9 mi), and River Grove (9 mi). Out past that: Franklin Park, Mount Prospect, and River Forest around 10-11 miles, then Prospect Heights, Melrose Park, Wheeling, Stone Park, Bensenville, Maywood, Northlake, Forest Park, Highwood, and Riverwoods around 11-12 miles, and Bellwood, Bannockburn, Wood Dale, Berkeley, Berwyn, and Broadview at 12-14.
Across that whole footprint the pattern holds: most homes went up between 1938 and 1994, and the bulk of that is 1960s-70s construction. That means a lot of original torsion setups, older track widths, and openers that have already been swapped once or twice. We don't have a house-by-house record for every one of these towns, so we're not going to claim a specific street or block anywhere on this list - we go where the call comes from, and we bring the parts that generation of door tends to need.