I had a hard time getting the Airport card seated properly when reconstructing. If the wire brace doesn't snap back in easily, then try reseating the card. Don't force it.
I didn't have a Torx #8, but was able to do this with a wire stripper (blunt part).
They aren't joking about these being trying times. Steps 15-20 are tough, especially if you don't have a spudger. A small flathead screwdriver works, but will scratch/nick your case.