We keep common gear-and-sprocket kits, drive belts, safety sensor pairs, and standard logic boards on the truck, because those cover most of what fails on openers installed anytime from the late 1980s forward. What we don't carry on the truck is a board for a motor model that was discontinued before it reached that era - some of the oldest chain-drive units still running on Inman's 1980s housing stock use parts that have to be special-ordered, and that can mean a second trip.
That's the honest limitation: if your opener is original to a house built in the early 1980s and the board is dead, we may not have the exact match in the truck. We'll tell you straight whether it's worth ordering the part or whether a new opener, installed the same visit type, makes more sense for the money.
We travel from Spartanburg to do this work, 12 miles each way, so when a part does need ordering we try to bundle it with your scheduled appointment rather than making you wait on a part and a separate trip both.