Because we're driving in from Fond du Lac rather than working out of a local yard, we bring standard widths and a couple of insulated options rather than trying to stock every size on the truck. Most Campbellsport openings we've measured line up with common residential widths from the 1950s-60s building era, so we plan for that first and confirm exact measurements before the truck rolls.
What we don't do is carry custom-cut doors or specialty glass panels as stock inventory. If your opening is non-standard, or you want a specific wood-look composite that isn't a common size, that's a special order with its own lead time, and we'll tell you that on the first visit rather than after we've already pulled the old door off the track.
We also bring torsion spring sets rated for the heavier insulated panels, since swapping a single-layer door for a double-layer one changes the spring weight the opener has to lift. Skipping that step is the single most common reason a new door install goes wrong within the first year.