Back to the hangar to finish up the air box and a few odds and ends. When I left, the epoxy was curing, and it was set enough that I could go ahead and rivet the assembly together. After that was finished, I rigged the door and cable.
I decided awhile ago that I would put the alternate air source to the right of the mixture cable, so I had drilled that previously to accept the cable. The cable itself is long enough to reach from about anywhere on the panel, so I think it looks best if all of the knobs are symmetrical and evenly spaced. A bit OCD perhaps...
After deciding on a firewall penetration point, I drilled the hole 3/8" to accept a snap bushing. I have a steel cover that I will install over this--I decided that this installation didn't merit one of the more expensive "eyeball" style assemblies. Attaching two Adel clamps to secure the cable on its trip to the door, and then rigging everything to work properly finished up the session.
I was a little surprised that the door doesn't open more than it does, but the cable only travels about two inches, so the door opens about halfway. I suspect that is more than enough air to keep the engine running in a pinch.