Because University Park's housing leans 1980s-90s, the truck carries parts sized for that era, not just the newest torsion hardware. That means extension spring sets in the common residential weights, drums and cables sized for older track configurations, and torsion conversion kits for owners who want off the extension-spring system entirely rather than replace in kind.
On openers, we stock standard chain-drive replacement units, since that's what's coming out of most original installs, plus the belt-drive upgrades homeowners ask for when they're already mid-repair and want quieter operation. Rollers and hinges are stocked in steel and nylon both - steel if the owner wants to match what's already there, nylon if they're tired of the noise.
The one thing we don't carry on the truck: parts for openers that were themselves aftermarket replacements of unknown make installed sometime in the last 35 years. If your opener isn't one of the common original-era models, the tech may need to order the exact part, which adds a day or two rather than same-visit.