If you own a garage in this part of Alabama, odds are the house underneath it went up between 1966 and 1980, with the median build year sitting around 1975. That is not a guess - it is what the housing stock across the service area actually looks like, and it shows up in four distinct pockets of town where that same era of construction repeats street after street.
A lot of those garages still have their original hardware: steel sectional doors, torsion springs sized for a lighter door than what has sometimes been swapped in since, and openers that have outlived two or three remotes. It is mostly the same mid-century stock throughout the county, not newer subdivisions with different hardware standards.
If your door is original to a house built in that window, we have probably seen its twin on the next street over, or ten miles down the road in one of the surrounding towns. We are not guessing at what is behind your door before we get there - we know the era, we know the common setups, and we bring the parts that actually fit.