Our tornado this spring caved in both of my 10x10 shop doors, kinked them right up the center(sorry no decent picture), the top panel had a permanent 6" kink in the center. The panels simply needed replacing, tracking, torsion springs etc were fine.
The guys show up to replace the panels and proceed to rip down every bit of the original hardware?? I'm like, "hey why bother?".
They said because the door is essentially "adjusted" as it's assembled, it was easier to start from scratch, as they'd probably end up loosening all the hardware to adjust it anyway.
This door did not fare as well:
9x7 door on my storage shed, wind blew the door completely out, and then blew the masonite hardboard siding off. If you look closely you can see that the spring cables are still attached to the door.
Yes, the springs were at FULL extension plus about 150%!!!
And I needed to get that generator on the left side out.
A big pair of diagonal cutters, safety glasses, a long reach around the corner of the door, and a couple big SCHWAAANGs!!!! later and the problem was solved.
Since the insurance was paying I just let the door company do the installs. The guys that did it were good, 3 complete, from scratch, installs in about 4 hours.
I've got 2 doors to replace on the house, old, not tornado damaged. Not sure if I'll do the installs or not, it is a major pain in the ****.