Well, the garage is done. I don’t know how long it took them, just that I got home around 5:20, and my garage smelled slightly of pine-sol, and the door looked different. The rails look much better, and having the front-mounted spring removes a lot of the bulk from the old system. Heck, they even swept the floor. I couldn’t find the bill they said they’d leave for me, so I’ll have to call tomorrow and ask about that.
Now that I have a door with proper weather-stripping and no 1" air gap at the bottom, I can look for other ways to weatherproof the garage. Hey, anything to make the house warmer, and easier to sell when the time comes. Yay!